CVE-2021-45444 (GCVE-0-2021-45444)

Vulnerability from cvelistv5 – Published: 2022-02-13 05:32 – Updated: 2024-08-04 04:39
VLAI
Summary
In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2349 records in the last 180 days details
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:39:20.752Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://zsh.sourceforge.io/releases.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://vuln.ryotak.me/advisories/63"
          },
          {
            "name": "FEDORA-2022-adf0c6d196",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/"
          },
          {
            "name": "DSA-5078",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5078"
          },
          {
            "name": "[debian-lts-announce] 20220218 [SECURITY] [DLA 2926-1] zsh security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html"
          },
          {
            "name": "FEDORA-2022-0a06987c3c",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://support.apple.com/kb/HT213257"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://support.apple.com/kb/HT213256"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://support.apple.com/kb/HT213255"
          },
          {
            "name": "20220516 APPLE-SA-2022-05-16-4 Security Update 2022-004 Catalina",
            "tags": [
              "mailing-list",
              "x_refsource_FULLDISC",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/33"
          },
          {
            "name": "20220516 APPLE-SA-2022-05-16-3 macOS Big Sur 11.6.6",
            "tags": [
              "mailing-list",
              "x_refsource_FULLDISC",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/35"
          },
          {
            "name": "20220516 APPLE-SA-2022-05-16-2 macOS Monterey 12.4",
            "tags": [
              "mailing-list",
              "x_refsource_FULLDISC",
              "x_transferred"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/38"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-05-17T06:08:11.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://zsh.sourceforge.io/releases.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://vuln.ryotak.me/advisories/63"
        },
        {
          "name": "FEDORA-2022-adf0c6d196",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/"
        },
        {
          "name": "DSA-5078",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5078"
        },
        {
          "name": "[debian-lts-announce] 20220218 [SECURITY] [DLA 2926-1] zsh security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html"
        },
        {
          "name": "FEDORA-2022-0a06987c3c",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://support.apple.com/kb/HT213257"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://support.apple.com/kb/HT213256"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://support.apple.com/kb/HT213255"
        },
        {
          "name": "20220516 APPLE-SA-2022-05-16-4 Security Update 2022-004 Catalina",
          "tags": [
            "mailing-list",
            "x_refsource_FULLDISC"
          ],
          "url": "http://seclists.org/fulldisclosure/2022/May/33"
        },
        {
          "name": "20220516 APPLE-SA-2022-05-16-3 macOS Big Sur 11.6.6",
          "tags": [
            "mailing-list",
            "x_refsource_FULLDISC"
          ],
          "url": "http://seclists.org/fulldisclosure/2022/May/35"
        },
        {
          "name": "20220516 APPLE-SA-2022-05-16-2 macOS Monterey 12.4",
          "tags": [
            "mailing-list",
            "x_refsource_FULLDISC"
          ],
          "url": "http://seclists.org/fulldisclosure/2022/May/38"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-45444",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://zsh.sourceforge.io/releases.html",
              "refsource": "MISC",
              "url": "https://zsh.sourceforge.io/releases.html"
            },
            {
              "name": "https://vuln.ryotak.me/advisories/63",
              "refsource": "MISC",
              "url": "https://vuln.ryotak.me/advisories/63"
            },
            {
              "name": "FEDORA-2022-adf0c6d196",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/"
            },
            {
              "name": "DSA-5078",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2022/dsa-5078"
            },
            {
              "name": "[debian-lts-announce] 20220218 [SECURITY] [DLA 2926-1] zsh security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html"
            },
            {
              "name": "FEDORA-2022-0a06987c3c",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/"
            },
            {
              "name": "https://support.apple.com/kb/HT213257",
              "refsource": "CONFIRM",
              "url": "https://support.apple.com/kb/HT213257"
            },
            {
              "name": "https://support.apple.com/kb/HT213256",
              "refsource": "CONFIRM",
              "url": "https://support.apple.com/kb/HT213256"
            },
            {
              "name": "https://support.apple.com/kb/HT213255",
              "refsource": "CONFIRM",
              "url": "https://support.apple.com/kb/HT213255"
            },
            {
              "name": "20220516 APPLE-SA-2022-05-16-4 Security Update 2022-004 Catalina",
              "refsource": "FULLDISC",
              "url": "http://seclists.org/fulldisclosure/2022/May/33"
            },
            {
              "name": "20220516 APPLE-SA-2022-05-16-3 macOS Big Sur 11.6.6",
              "refsource": "FULLDISC",
              "url": "http://seclists.org/fulldisclosure/2022/May/35"
            },
            {
              "name": "20220516 APPLE-SA-2022-05-16-2 macOS Monterey 12.4",
              "refsource": "FULLDISC",
              "url": "http://seclists.org/fulldisclosure/2022/May/38"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-45444",
    "datePublished": "2022-02-13T05:32:21.000Z",
    "dateReserved": "2021-12-21T00:00:00.000Z",
    "dateUpdated": "2024-08-04T04:39:20.752Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-45444",
      "date": "2026-10-17",
      "epss": "0.0198",
      "percentile": "0.80213"
    },
    "microsoft_vex": {
      "current_release_date": "2022-02-23T00:00:00.000Z",
      "cve": "CVE-2021-45444",
      "id": "msrc_CVE-2021-45444",
      "initial_release_date": "2022-02-02T00:00:00.000Z",
      "product_status:fixed": "2",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "In zsh before 5.8.1 an attacker can achieve code execution if they control a command output inside the prompt as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion.",
      "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-45444.json",
      "version": "1"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "n/a",
                "vendor": "n/a",
                "versions": [
                  {
                    "status": "affected",
                    "version": "n/a"
                  }
                ]
              }
            ],
            "source": "cve@mitre.org"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:zsh:zsh:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9E81CC0B-D7B9-40E7-82F9-DFAE6C223E71",
                    "versionEndExcluding": "5.8.1",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
                    "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DB8A73F8-3074-4B32-B9F6-343B6B1988C5",
                    "versionEndExcluding": "10.15.7",
                    "versionStartIncluding": "10.15",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*",
                    "matchCriteriaId": "F12CC8B5-C1EB-419E-8496-B9A3864656AD",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*",
                    "matchCriteriaId": "F1F4BF7F-90D4-4668-B4E6-B06F4070F448",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-005:*:*:*:*:*:*",
                    "matchCriteriaId": "7FD7176C-F4D1-43A7-9E49-BA92CA0D9980",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:*",
                    "matchCriteriaId": "2703DE0B-8A9E-4A9D-9AE8-028E22BF47CA",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*",
                    "matchCriteriaId": "0F441A43-1669-478D-9EC8-E96882DE4F9F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*",
                    "matchCriteriaId": "D425C653-37A2-448C-BF2F-B684ADB08A26",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*",
                    "matchCriteriaId": "A54D63B7-B92B-47C3-B1C5-9892E5873A98",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*",
                    "matchCriteriaId": "012052B5-9AA7-4FD3-9C80-5F615330039D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:*",
                    "matchCriteriaId": "50F21A3C-0AC3-48C5-A4F8-5A7B478875B4",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-008:*:*:*:*:*:*",
                    "matchCriteriaId": "8E974DC6-F7D9-4389-9AF9-863F6E419CE6",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-001:*:*:*:*:*:*",
                    "matchCriteriaId": "156A6382-2BD3-4882-90B2-8E7CF6659E17",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-002:*:*:*:*:*:*",
                    "matchCriteriaId": "20A2FDB2-6712-406A-9896-C0B44508B07D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-003:*:*:*:*:*:*",
                    "matchCriteriaId": "49F537A0-DC42-4176-B22F-C80D179DD99D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "09A6345C-D813-43BA-B12E-789C80653F86",
                    "versionEndExcluding": "11.6.6",
                    "versionStartIncluding": "11.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "56A8A170-44A7-4334-88B0-CB4413E28E53",
                    "versionEndExcluding": "12.4",
                    "versionStartIncluding": "12.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion."
          },
          {
            "lang": "es",
            "value": "En zsh versiones anteriores a 5.8.1, un atacante puede lograr una ejecuci\u00f3n de c\u00f3digo si controla la salida de un comando dentro del prompt, como lo demuestra un argumento %F. Esto ocurre debido a la expansi\u00f3n recursiva PROMPT_SUBST"
          }
        ],
        "id": "CVE-2021-45444",
        "lastModified": "2026-06-17T04:13:22.823",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "HIGH",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 5.1,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 4.9,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2022-02-14T12:15:15.750",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/33"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/35"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/38"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://support.apple.com/kb/HT213255"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://support.apple.com/kb/HT213256"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://support.apple.com/kb/HT213257"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://vuln.ryotak.me/advisories/63"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5078"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Release Notes",
              "Third Party Advisory"
            ],
            "url": "https://zsh.sourceforge.io/releases.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/33"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/35"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://seclists.org/fulldisclosure/2022/May/38"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://support.apple.com/kb/HT213255"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://support.apple.com/kb/HT213256"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://support.apple.com/kb/HT213257"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://vuln.ryotak.me/advisories/63"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5078"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Release Notes",
              "Third Party Advisory"
            ],
            "url": "https://zsh.sourceforge.io/releases.html"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T15:53:39+00:00",
      "cve": "CVE-2021-45444",
      "id": "CVE-2021-45444",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:fixed": "28",
      "product_status:known_not_affected": "7",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "zsh: Prompt expansion vulnerability",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-45444.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.