Vulnerability-Lookup

WID-SEC-W-2026-0688

Vulnerability from csaf_certbund - Published: 2026-03-10 23:00 - Updated: 2026-03-30 22:00

Summary

cPanel cPanel/WHM: Mehrere Schwachstellen

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: cPanel ist eine Software für die Verwaltung von Webhosting Auftritten. Die Software ermöglicht es dem Endanwender, Statistiken einzusehen, neue Benutzeraccounts anzulegen, Maileinstellungen zu verändern und vieles mehr.

Angriff: Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in cPanel cPanel/WHM ausnutzen, um Sicherheitsvorkehrungen zu umgehen und einen Denial of Service zu verursachen.

Betroffene Betriebssysteme: - Linux - UNIX

CVE-2021-4456

CVE-2026-2474

References

URL

Category

	https://wid.cert-bund.de/.well-known/csaf/white/2…	self
	https://wid.cert-bund.de/portal/wid/securityadvis…	self
	https://docs.cpanel.net/changelogs/110-change-log…	external
	https://docs.cpanel.net/changelogs/126-change-log…	external
	https://docs.cpanel.net/changelogs/132-change-log…	external
	https://docs.cpanel.net/changelogs/134-change-log…	external
	https://ubuntu.com/security/notices/USN-8110-1	external
	https://lists.opensuse.org/archives/list/security…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "cPanel ist eine Software f\u00fcr die Verwaltung von Webhosting Auftritten. Die Software erm\u00f6glicht es dem Endanwender, Statistiken einzusehen, neue Benutzeraccounts anzulegen, Maileinstellungen zu ver\u00e4ndern und vieles mehr.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in cPanel cPanel/WHM ausnutzen, um Sicherheitsvorkehrungen zu umgehen und einen Denial of Service zu verursachen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0688 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0688.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0688 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0688"
      },
      {
        "category": "external",
        "summary": "cPanel 110.0.91 Change Log vom 2026-03-10",
        "url": "https://docs.cpanel.net/changelogs/110-change-log/#110091"
      },
      {
        "category": "external",
        "summary": "cPanel 126.0.48 Change Log vom 2026-03-10",
        "url": "https://docs.cpanel.net/changelogs/126-change-log/#126048"
      },
      {
        "category": "external",
        "summary": "cPanel 132.0.27 Change Log vom 2026-03-10",
        "url": "https://docs.cpanel.net/changelogs/132-change-log/#132027"
      },
      {
        "category": "external",
        "summary": "cPanel 134.0.11 Change Log vom 2026-03-10",
        "url": "https://docs.cpanel.net/changelogs/134-change-log/#134011"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8110-1 vom 2026-03-23",
        "url": "https://ubuntu.com/security/notices/USN-8110-1"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:0110-1 vom 2026-03-31",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/2KQRZKEYGWS7NKFCWV2MNMXZP2AZ3HER/"
      }
    ],
    "source_lang": "en-US",
    "title": "cPanel cPanel/WHM: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-03-30T22:00:00.000+00:00",
      "generator": {
        "date": "2026-03-31T08:19:43.693+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-0688",
      "initial_release_date": "2026-03-10T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-03-10T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-03-22T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2026-03-30T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von openSUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE openSUSE",
            "product": {
              "name": "SUSE openSUSE",
              "product_id": "T027843",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:opensuse:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c134.0.11",
                "product": {
                  "name": "cPanel cPanel/WHM \u003c134.0.11",
                  "product_id": "T051604"
                }
              },
              {
                "category": "product_version",
                "name": "134.0.11",
                "product": {
                  "name": "cPanel cPanel/WHM 134.0.11",
                  "product_id": "T051604-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:cpanel:cpanel_whm:134.0.11"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c132.0.27",
                "product": {
                  "name": "cPanel cPanel/WHM \u003c132.0.27",
                  "product_id": "T051605"
                }
              },
              {
                "category": "product_version",
                "name": "132.0.27",
                "product": {
                  "name": "cPanel cPanel/WHM 132.0.27",
                  "product_id": "T051605-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:cpanel:cpanel_whm:132.0.27"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c126.0.48",
                "product": {
                  "name": "cPanel cPanel/WHM \u003c126.0.48",
                  "product_id": "T051606"
                }
              },
              {
                "category": "product_version",
                "name": "126.0.48",
                "product": {
                  "name": "cPanel cPanel/WHM 126.0.48",
                  "product_id": "T051606-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:cpanel:cpanel_whm:126.0.48"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c110.0.91",
                "product": {
                  "name": "cPanel cPanel/WHM \u003c110.0.91",
                  "product_id": "T051607"
                }
              },
              {
                "category": "product_version",
                "name": "110.0.91",
                "product": {
                  "name": "cPanel cPanel/WHM 110.0.91",
                  "product_id": "T051607-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:cpanel:cpanel_whm:110.0.91"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "cPanel/WHM"
          }
        ],
        "category": "vendor",
        "name": "cPanel"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-4456",
      "product_status": {
        "known_affected": [
          "T051606",
          "T051607",
          "T051604",
          "T051605",
          "T000126",
          "T027843"
        ]
      },
      "release_date": "2026-03-10T23:00:00.000+00:00",
      "title": "CVE-2021-4456"
    },
    {
      "cve": "CVE-2026-2474",
      "product_status": {
        "known_affected": [
          "T051606",
          "T051607",
          "T051604",
          "T051605",
          "T000126",
          "T027843"
        ]
      },
      "release_date": "2026-03-10T23:00:00.000+00:00",
      "title": "CVE-2026-2474"
    }
  ]
}

CVE-2026-2474 (GCVE-0-2026-2474)

Vulnerability from cvelistv5 – Published: 2026-02-16 20:54 – Updated: 2026-02-17 14:48

Title

Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom()

Summary

Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom(). The function does not validate that the length parameter is non-negative. If a negative value (e.g. -1) is supplied, the expression length + 1u causes an integer wraparound, resulting in a zero-byte allocation. The subsequent call to getrandom(data, length, GRND_NONBLOCK) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZE_MAX). This can result in writes beyond the allocated buffer, leading to heap memory corruption and application crash (denial of service). In common usage, the length argument is typically hardcoded by the caller, which reduces the likelihood of attacker-controlled exploitation. Applications that pass untrusted input to this parameter may be affected.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-1284 - Improper Validation of Specified Quantity in Input

Assigner

CPANSec

References

URL

Tags

	https://metacpan.org/release/DDICK/Crypt-URandom-…	release-notes
	https://metacpan.org/release/DDICK/Crypt-URandom-…	related

Impacted products

	Vendor	Product	Version
	DDICK	Crypt::URandom	Affected: 0.41 , < 0.55 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-2474",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-17T14:47:36.338726Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-17T14:48:49.595Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Crypt-URandom",
          "product": "Crypt::URandom",
          "programFiles": [
            "URandom.xs"
          ],
          "programRoutines": [
            {
              "name": "crypt_urandom_getrandom()"
            }
          ],
          "repo": "https://github.com/david-dick/crypt-urandom",
          "vendor": "DDICK",
          "versions": [
            {
              "lessThan": "0.55",
              "status": "affected",
              "version": "0.41",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom().\n\nThe function does not validate that the length parameter is non-negative. If a negative value (e.g. -1) is supplied, the expression length + 1u causes an integer wraparound, resulting in a zero-byte allocation. The subsequent call to getrandom(data, length, GRND_NONBLOCK) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZE_MAX). This can result in writes beyond the allocated buffer, leading to heap memory corruption and application crash (denial of service).\n\nIn common usage, the length argument is typically hardcoded by the caller, which reduces the likelihood of attacker-controlled exploitation. Applications that pass untrusted input to this parameter may be affected."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122 Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1284",
              "description": "CWE-1284 Improper Validation of Specified Quantity in Input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-16T20:54:51.357Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/DDICK/Crypt-URandom-0.55/source/Changes"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://metacpan.org/release/DDICK/Crypt-URandom-0.54/source/URandom.xs#L35-79"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update to version 0.55 or later"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom()",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-2474",
    "datePublished": "2026-02-16T20:54:51.357Z",
    "dateReserved": "2026-02-13T15:45:19.206Z",
    "dateUpdated": "2026-02-17T14:48:49.595Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2021-4456 (GCVE-0-2021-4456)

Vulnerability from cvelistv5 – Published: 2026-02-27 00:16 – Updated: 2026-02-27 16:53

Title

Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact

Summary

Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact. The functions `addr2cidr` and `cidrlookup` may return leading zeros in a CIDR string, which may in turn be parsed as octal numbers by subsequent users. In some cases an attacker may be able to leverage this to bypass access controls based on IP addresses. The documentation advises validating untrusted CIDR strings with the `cidrvalidate` function. However, this mitigation is optional and not enforced by default. In practice, users may call `addr2cidr` or `cidrlookup` with untrusted input and without validation, incorrectly assuming that this is safe.

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE

CWE-704 - Incorrect Type Conversion or Cast

Assigner

CPANSec

References

URL

Tags

	https://blog.urth.org/2021/03/29/security-issues-…	related
	https://github.com/svarshavchik/Net-CIDR/commit/e…	patch
	https://metacpan.org/dist/Net-CIDR/changes	release-notes

Impacted products

	Vendor	Product	Version
	MRSAM	Net::CIDR	Affected: 0 , < 0.24 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-4456",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-27T16:52:58.903437Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-27T16:53:23.671Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Net-CIDR",
          "product": "Net::CIDR",
          "programRoutines": [
            {
              "name": "addr2cidr"
            },
            {
              "name": "cidrlookup"
            }
          ],
          "repo": "https://github.com/svarshavchik/Net-CIDR",
          "vendor": "MRSAM",
          "versions": [
            {
              "lessThan": "0.24",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact.\n\nThe functions `addr2cidr` and `cidrlookup` may return leading zeros in a CIDR string, which may in turn be parsed as octal numbers by subsequent users. In some cases an attacker may be able to leverage this to bypass access controls based on IP addresses.\n\nThe documentation advises validating untrusted CIDR strings with the `cidrvalidate` function. However, this mitigation is optional and not enforced by default. In practice, users may call `addr2cidr` or `cidrlookup` with untrusted input and without validation, incorrectly assuming that this is safe."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-704",
              "description": "CWE-704 Incorrect Type Conversion or Cast",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-27T00:16:36.383Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "related"
          ],
          "url": "https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/svarshavchik/Net-CIDR/commit/e3648c6bc6bdd018f90cca4149c467017d42bd10"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/dist/Net-CIDR/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Use the `cidrvalidate` function on untrusted input before passing to the affected functions or upgrade to version 0.24 or later"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2021-4456",
    "datePublished": "2026-02-27T00:16:36.383Z",
    "dateReserved": "2025-05-18T22:36:11.463Z",
    "dateUpdated": "2026-02-27T16:53:23.671Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2026-0688

CVE-2026-2474 (GCVE-0-2026-2474)

CVE-2021-4456 (GCVE-0-2021-4456)

Tags

Sightings

Nomenclature