Vulnerability-Lookup

GHSA-V6X3-9R38-R27Q

Vulnerability from github – Published: 2025-12-14 06:30 – Updated: 2025-12-16 19:30

Summary

Sequoia PGP has Subtraction Overflow when aes_key_unwrap function is provided ciphertext that is too short

Details

In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.

Severity

5.3 (Medium)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "sequoia-openpgp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-67897"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-195"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-16T19:30:41Z",
    "nvd_published_at": "2025-12-14T05:16:06Z",
    "severity": "MODERATE"
  },
  "details": "In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.",
  "id": "GHSA-v6x3-9r38-r27q",
  "modified": "2025-12-16T19:30:41Z",
  "published": "2025-12-14T06:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67897"
    },
    {
      "type": "WEB",
      "url": "https://bugs.debian.org/1122582"
    },
    {
      "type": "PACKAGE",
      "url": "https://gitlab.com/sequoia-pgp/sequoia"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59886e5e7bdf7169ed330f309a6633d131776e5/openpgp/NEWS#L7-L26"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/sequoia-pgp/sequoia/-/commit/b59886e5e7bdf7169ed330f309a6633d131776e5"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0136.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Sequoia PGP has Subtraction Overflow when aes_key_unwrap function is provided ciphertext that is too short"
}

CVE-2025-67897 (GCVE-0-2025-67897)

Vulnerability from cvelistv5 – Published: 2025-12-14 04:35 – Updated: 2025-12-15 21:29

Summary

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-15 21:28 UTC

CWE

CWE-195 - Signed to Unsigned Conversion Error

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2350 records in the last 180 days details

References

3 references

URL	Tags
https://gitlab.com/sequoia-pgp/sequoia/-/commit/b…
https://bugs.debian.org/1122582
https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59…

Impacted products

1 product

Vendor	Product	Version
sequoia-pgp	sequoia	Affected: 0 , < 2.1.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-67897",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-15T21:28:46.931322Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-15T21:29:01.140Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:cargo/sequoia-openpgp",
          "product": "sequoia",
          "vendor": "sequoia-pgp",
          "versions": [
            {
              "lessThan": "2.1.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-195",
              "description": "CWE-195 Signed to Unsigned Conversion Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-15T04:27:58.389Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://gitlab.com/sequoia-pgp/sequoia/-/commit/b59886e5e7bdf7169ed330f309a6633d131776e5"
        },
        {
          "url": "https://bugs.debian.org/1122582"
        },
        {
          "url": "https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59886e5e7bdf7169ed330f309a6633d131776e5/openpgp/NEWS#L7-L26"
        }
      ],
      "x_generator": {
        "engine": "CVE-Request-form 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2025-67897",
    "datePublished": "2025-12-14T04:35:24.610Z",
    "dateReserved": "2025-12-14T04:35:24.299Z",
    "dateUpdated": "2025-12-15T21:29:01.140Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

RUSTSEC-2025-0136 (CVE-2025-67897)

Vulnerability from osv_rustsec – Published: 2025-11-07 12:00 – Updated: 2025-12-17 06:01 – Source website

Summary

Underflow in aes_key_unwrap function

Details

The aes_key_unwrap function would panic if passed a ciphertext that was too short. In a debug build, it would panic due to a subtraction underflow. In a release build, it would use the small negative quantity to allocate a vector. Since the allocator expects an unsigned quantity, the negative value would be interpreted as a huge allocation. The allocator would then fail to allocate the memory and panic.

An attacker could trigger this panic by sending a victim an encrypted message whose PKESK or SKESK packet has been specially modified. When the victim decrypts the message, the program would crash.

Severity

4.3 (Medium)


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

References

URL

Type

	https://crates.io/crates/sequoia-openpgp	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2025-0136.html	ADVISORY
	https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59…	WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "sequoia_openpgp::crypto::ecdh::aes_key_unwrap"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "sequoia-openpgp",
        "purl": "pkg:cargo/sequoia-openpgp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "2.1.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2025-67897",
    "GHSA-v6x3-9r38-r27q"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The `aes_key_unwrap` function would panic if passed a ciphertext\nthat was too short.  In a debug build, it would panic due to a\nsubtraction underflow.  In a release build, it would use the\nsmall negative quantity to allocate a vector.  Since the\nallocator expects an unsigned quantity, the negative value would\nbe interpreted as a huge allocation.  The allocator would then\nfail to allocate the memory and panic.\n\nAn attacker could trigger this panic by sending a victim an\nencrypted message whose PKESK or SKESK packet has been specially\nmodified.  When the victim decrypts the message, the program\nwould crash.",
  "id": "RUSTSEC-2025-0136",
  "modified": "2025-12-17T06:01:32Z",
  "published": "2025-11-07T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/sequoia-openpgp"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0136.html"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/sequoia-pgp/sequoia/-/blob/b59886e5e7bdf7169ed330f309a6633d131776e5/openpgp/NEWS#L7-L26"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Underflow in aes_key_unwrap function"
}

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.

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.

Action not permitted

GHSA-V6X3-9R38-R27Q

CVE-2025-67897 (GCVE-0-2025-67897)

RUSTSEC-2025-0136 (CVE-2025-67897)

Tags

Sightings

Nomenclature

Related by attack behaviour