Vulnerability-Lookup

CNVD-2020-57870

Vulnerability from cnvd - Published: 2020-10-22

Title

Google Tink数据伪造问题漏洞

Description

Tink是美国谷歌（Google）的一个多语言跨平台的提供加密API的一个开发库。 Tink 1.5之前版本存在安全漏洞，该漏洞源于对无效unicode字符的错误处理，攻击者可利用该漏洞更改密文的ID部分，这将导致创建第二个密文，该密文可以解密为相同的明文，这可能是使用单个密钥加密确定性AEAD时的一个问题，并且依赖于每明文唯一的密文。

Severity

中

Patch Name

Google Tink数据伪造问题漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/google/tink/commit/93d839a5865b9d950dffdc9d0bc99b71280a8899

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-8929

Impacted products

Name
Google Google Tink <1.5

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-8929",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-8929"
    }
  },
  "description": "Tink\u662f\u7f8e\u56fd\u8c37\u6b4c\uff08Google\uff09\u7684\u4e00\u4e2a\u591a\u8bed\u8a00\u8de8\u5e73\u53f0\u7684\u63d0\u4f9b\u52a0\u5bc6API\u7684\u4e00\u4e2a\u5f00\u53d1\u5e93\u3002\n\nTink 1.5\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5bf9\u65e0\u6548unicode\u5b57\u7b26\u7684\u9519\u8bef\u5904\u7406\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u66f4\u6539\u5bc6\u6587\u7684ID\u90e8\u5206\uff0c\u8fd9\u5c06\u5bfc\u81f4\u521b\u5efa\u7b2c\u4e8c\u4e2a\u5bc6\u6587\uff0c\u8be5\u5bc6\u6587\u53ef\u4ee5\u89e3\u5bc6\u4e3a\u76f8\u540c\u7684\u660e\u6587\uff0c\u8fd9\u53ef\u80fd\u662f\u4f7f\u7528\u5355\u4e2a\u5bc6\u94a5\u52a0\u5bc6\u786e\u5b9a\u6027AEAD\u65f6\u7684\u4e00\u4e2a\u95ee\u9898\uff0c\u5e76\u4e14\u4f9d\u8d56\u4e8e\u6bcf\u660e\u6587\u552f\u4e00\u7684\u5bc6\u6587\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/google/tink/commit/93d839a5865b9d950dffdc9d0bc99b71280a8899",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-57870",
  "openTime": "2020-10-22",
  "patchDescription": "Tink\u662f\u7f8e\u56fd\u8c37\u6b4c\uff08Google\uff09\u7684\u4e00\u4e2a\u591a\u8bed\u8a00\u8de8\u5e73\u53f0\u7684\u63d0\u4f9b\u52a0\u5bc6API\u7684\u4e00\u4e2a\u5f00\u53d1\u5e93\u3002\r\n\r\nTink 1.5\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5bf9\u65e0\u6548unicode\u5b57\u7b26\u7684\u9519\u8bef\u5904\u7406\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u66f4\u6539\u5bc6\u6587\u7684ID\u90e8\u5206\uff0c\u8fd9\u5c06\u5bfc\u81f4\u521b\u5efa\u7b2c\u4e8c\u4e2a\u5bc6\u6587\uff0c\u8be5\u5bc6\u6587\u53ef\u4ee5\u89e3\u5bc6\u4e3a\u76f8\u540c\u7684\u660e\u6587\uff0c\u8fd9\u53ef\u80fd\u662f\u4f7f\u7528\u5355\u4e2a\u5bc6\u94a5\u52a0\u5bc6\u786e\u5b9a\u6027AEAD\u65f6\u7684\u4e00\u4e2a\u95ee\u9898\uff0c\u5e76\u4e14\u4f9d\u8d56\u4e8e\u6bcf\u660e\u6587\u552f\u4e00\u7684\u5bc6\u6587\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Google Tink\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Google Google Tink \u003c1.5"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-8929",
  "serverity": "\u4e2d",
  "submitTime": "2020-10-20",
  "title": "Google Tink\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-8929 (GCVE-0-2020-8929)

Vulnerability from cvelistv5 – Published: 2020-10-19 12:15 – Updated: 2024-08-04 10:12

Title

Ciphertext integrity weakness in Tink

Summary

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.

Severity

5.3 (Medium)


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

CWE

CWE-176 - Improper Handling of Unicode Encoding

Assigner

Google Google root

References

2 references

URL	Tags
https://github.com/google/tink/commit/93d839a5865…	x_refsource_CONFIRM
https://github.com/google/tink/security/advisorie…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
Google LLC	Tink	Affected: stable , < 1.5 (custom)

Credits

Peter Esbensen

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-04T10:12:11.052Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://github.com/google/tink/commit/93d839a5865b9d950dffdc9d0bc99b71280a8899"
          },
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/google/tink/security/advisories/GHSA-g5vf-v6wf-7w2r"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "platforms": [
            "Java"
          ],
          "product": "Tink",
          "vendor": "Google LLC",
          "versions": [
            {
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              "status": "affected",
              "version": "stable",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
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      ],
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        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/google/tink/security/advisories/GHSA-g5vf-v6wf-7w2r"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Ciphertext integrity weakness in Tink",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
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          "ID": "CVE-2020-8929",
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        },
        "affects": {
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                      "version": {
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                },
                "vendor_name": "Google LLC"
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

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CNVD-2020-57870

CVE-2020-8929 (GCVE-0-2020-8929)

Tags

Sightings

Nomenclature

Related by attack behaviour