GSD-2020-8929

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
A mis-handling of invalid unicode characters in the Java implementation of Tink versions prior to 1.5 allows an attacker to change the ID part of a ciphertext, which result in the creation of a second ciphertext that can decrypt to the same plaintext. This can be a problem with encrypting deterministic AEAD with a single key, and rely on a unique ciphertext-per-plaintext.
Aliases
Aliases
CVE-2020-8929
To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-8929",
    "description": "A mis-handling of invalid unicode characters in the Java implementation of Tink versions prior to 1.5 allows an attacker to change the ID part of a ciphertext, which result in the creation of a second ciphertext that can decrypt to the same plaintext. This can be a problem with encrypting deterministic AEAD with a single key, and rely on a unique ciphertext-per-plaintext.",
    "id": "GSD-2020-8929"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-8929"
      ],
      "details": "A mis-handling of invalid unicode characters in the Java implementation of Tink versions prior to 1.5 allows an attacker to change the ID part of a ciphertext, which result in the creation of a second ciphertext that can decrypt to the same plaintext. This can be a problem with encrypting deterministic AEAD with a single key, and rely on a unique ciphertext-per-plaintext.",
      "id": "GSD-2020-8929",
      "modified": "2023-12-13T01:21:54.365323Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security@google.com",
        "ID": "CVE-2020-8929",
        "STATE": "PUBLIC",
        "TITLE": "Ciphertext integrity weakness in Tink"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Tink",
                    "version": {
                      "version_data": [
                        {
                          "platform": "Java",
                          "version_affected": "\u003c",
                          "version_name": "stable",
                          "version_value": "1.5"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Google LLC"
            }
          ]
        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "Peter Esbensen"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "A mis-handling of invalid unicode characters in the Java implementation of Tink versions prior to 1.5 allows an attacker to change the ID part of a ciphertext, which result in the creation of a second ciphertext that can decrypt to the same plaintext. This can be a problem with encrypting deterministic AEAD with a single key, and rely on a unique ciphertext-per-plaintext."
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-176 Improper Handling of Unicode Encoding"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/google/tink/commit/93d839a5865b9d950dffdc9d0bc99b71280a8899",
            "refsource": "CONFIRM",
            "url": "https://github.com/google/tink/commit/93d839a5865b9d950dffdc9d0bc99b71280a8899"
          },
          {
            "name": "https://github.com/google/tink/security/advisories/GHSA-g5vf-v6wf-7w2r",
            "refsource": "CONFIRM",
            "url": "https://github.com/google/tink/security/advisories/GHSA-g5vf-v6wf-7w2r"
          }
        ]
      },
      "source": {
        "discovery": "EXTERNAL"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "(,1.5)",
          "affected_versions": "All versions before 1.5",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2020-10-29",
          "description": "A mis-handling of invalid unicode characters in the Java implementation of Tink allows an attacker to change the `ID` part of a ciphertext, which result in the creation of a second ciphertext that can decrypt to the same plaintext. This can be a problem with encrypting deterministic `AEAD` with a single key, and rely on a unique ciphertext-per-plaintext.",
          "fixed_versions": [
            "1.5.0"
          ],
          "identifier": "CVE-2020-8929",
          "identifiers": [
            "CVE-2020-8929",
            "GHSA-g5vf-v6wf-7w2r"
          ],
          "not_impacted": "All versions starting from 1.5",
          "package_slug": "maven/com.google.crypto.tink/tink",
          "pubdate": "2020-10-19",
          "solution": "Upgrade to version 1.5.0 or above.",
          "title": "Incorrect Calculation",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-8929"
          ],
          "uuid": "e68c4a39-06ae-4b0e-99bd-0ebea54a0b4d"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:google:tink:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.5",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security@google.com",
          "ID": "CVE-2020-8929"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "A mis-handling of invalid unicode characters in the Java implementation of Tink versions prior to 1.5 allows an attacker to change the ID part of a ciphertext, which result in the creation of a second ciphertext that can decrypt to the same plaintext. This can be a problem with encrypting deterministic AEAD with a single key, and rely on a unique ciphertext-per-plaintext."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "NVD-CWE-Other"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/google/tink/security/advisories/GHSA-g5vf-v6wf-7w2r",
              "refsource": "CONFIRM",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/google/tink/security/advisories/GHSA-g5vf-v6wf-7w2r"
            },
            {
              "name": "https://github.com/google/tink/commit/93d839a5865b9d950dffdc9d0bc99b71280a8899",
              "refsource": "CONFIRM",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/google/tink/commit/93d839a5865b9d950dffdc9d0bc99b71280a8899"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2020-10-29T22:16Z",
      "publishedDate": "2020-10-19T13:15Z"
    }
  }
}



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