github - ghsa-6qxw-x3vc-phrg

GHSA-6QXW-X3VC-PHRG

Vulnerability from github – Published: 2025-12-14 06:30 – Updated: 2025-12-19 00:31

Details

Exim before 4.99.1 allows remote heap corruption that will be further described on 2025-12-18.

Severity ?

6.4 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-67896"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-14T04:15:50Z",
    "severity": "MODERATE"
  },
  "details": "Exim before 4.99.1 allows remote heap corruption that will be further described on 2025-12-18.",
  "id": "GHSA-6qxw-x3vc-phrg",
  "modified": "2025-12-19T00:31:41Z",
  "published": "2025-12-14T06:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67896"
    },
    {
      "type": "WEB",
      "url": "https://exim.org/static/doc/security"
    },
    {
      "type": "WEB",
      "url": "https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2025/12/11/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/12/14/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/12/18/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-67896 (GCVE-0-2025-67896)

Vulnerability from cvelistv5 – Published: 2025-12-14 04:00 – Updated: 2025-12-18 23:04

Summary

Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.

Severity ?

7 (High)


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

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

mitre

References

URL

Tags

	https://www.openwall.com/lists/oss-security/2025/…
	https://exim.org/static/doc/security/
	https://exim.org/static/doc/security/EXIM-Securit…

Impacted products

	Vendor	Product	Version
	Exim	Exim	Affected: 4.99 , < 4.99.1 (custom)

Show details on NVD website

JSON

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  "containers": {
    "adp": [
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        "providerMetadata": {
          "dateUpdated": "2025-12-18T23:04:16.938Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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          {
            "url": "http://www.openwall.com/lists/oss-security/2025/12/14/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/12/18/3"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-67896",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-15T21:27:33.707603Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-15T21:27:45.955Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Exim",
          "vendor": "Exim",
          "versions": [
            {
              "lessThan": "4.99.1",
              "status": "affected",
              "version": "4.99",
              "versionType": "custom"
            }
          ]
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      ],
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                }
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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          "url": "https://exim.org/static/doc/security/"
        },
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        }
      ],
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  "cveMetadata": {
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    "datePublished": "2025-12-14T04:00:24.337Z",
    "dateReserved": "2025-12-14T04:00:24.063Z",
    "dateUpdated": "2025-12-18T23:04:16.938Z",
    "state": "PUBLISHED"
  },
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  "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

GHSA-6QXW-X3VC-PHRG

CVE-2025-67896 (GCVE-0-2025-67896)

Tags

Sightings

Nomenclature