github - ghsa-596c-w2jc-jmmx

GHSA-596C-W2JC-JMMX

Vulnerability from github – Published: 2025-06-18 18:30 – Updated: 2025-11-03 21:34

Details

This vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.

Severity ?

9.8 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-20260"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T18:15:23Z",
    "severity": "CRITICAL"
  },
  "details": "A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\n\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.",
  "id": "GHSA-596c-w2jc-jmmx",
  "modified": "2025-11-03T21:34:04Z",
  "published": "2025-06-18T18:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-20260"
    },
    {
      "type": "WEB",
      "url": "https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-20260 (GCVE-0-2025-20260)

Vulnerability from cvelistv5 – Published: 2025-06-18 17:08 – Updated: 2025-11-03 18:08

Summary

A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device. This vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.

Severity ?

9.8 (Critical)


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

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

cisco

References

URL

Tags

https://blog.clamav.net/2025/06/clamav-143-and-10…

Impacted products

	Vendor	Product	Version
	Cisco	ClamAV	Affected: 1.4.2 Affected: 1.4.1 Affected: 1.4.0 Affected: 1.3.2 Affected: 1.3.1 Affected: 1.3.0 Affected: 1.2.3 Affected: 1.2.2 Affected: 1.2.1 Affected: 1.2.0

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-20260",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-18T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-19T03:55:07.784Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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        "providerMetadata": {
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        "references": [
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            "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html"
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      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "ClamAV",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "1.4.2"
            },
            {
              "status": "affected",
              "version": "1.4.1"
            },
            {
              "status": "affected",
              "version": "1.4.0"
            },
            {
              "status": "affected",
              "version": "1.3.2"
            },
            {
              "status": "affected",
              "version": "1.3.1"
            },
            {
              "status": "affected",
              "version": "1.3.0"
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              "status": "affected",
              "version": "1.2.3"
            },
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              "status": "affected",
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              "status": "affected",
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        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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      },
      "references": [
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          "name": "clamav-143-and-109-security-patch",
          "url": "https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html"
        }
      ],
      "source": {
        "advisory": "clamav-143-and-109-security-patch",
        "defects": [
          "CSCwo64672"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "ClamAV PDF Scanning Buffer Overflow Vulnerability"
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  "cveMetadata": {
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    "dateReserved": "2024-10-10T19:15:13.243Z",
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

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-596C-W2JC-JMMX

CVE-2025-20260 (GCVE-0-2025-20260)

Tags

Sightings

Nomenclature