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imagemagick — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2021-20311

A flaw was found in ImageMagick in versions before 7.0.11, where a division by zero in sRGBTransformImage() in the MagickCore/colorspace.c may trigger undefined behavior via a crafted image file that is submitted by an attacker processed by an application using ImageMagick. The highest threat from this vulnerability is to system availability.

Products
imagemagick
Affected versions
Not specified
Fixed versions
8:6.9.11.60+dfsg-1.5
CVEs
CVE-2021-20311
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 00:19 UTC · Revision 1

Source evidence

DEBIAN-CVE-2021-20311

core-osv · Original source

Published 11 May 2021, 23:15 UTC

A flaw was found in ImageMagick in versions before 7.0.11, where a division by zero in sRGBTransformImage() in the MagickCore/colorspace.c may trigger undefined behavior via a crafted image file that is submitted by an attacker processed by an application using ImageMagick. The highest threat from this vulnerability is to system availability.

osv:DEBIAN-CVE-2021-20311

imagemagick

Fixed versions: 8:6.9.11.60+dfsg-1.5

imagemagick

Fixed versions: 8:6.9.11.60+dfsg-1.5

imagemagick

Fixed versions: 8:6.9.11.60+dfsg-1.5

Complete source record
{
  "id": "be351715ccd06f0ec29e15ab5686c63370618c84a9ec0e3ae15c45a729038ccd",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-20311",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2021-20311",
    "summary": "A flaw was found in ImageMagick in versions before 7.0.11, where a division by zero in sRGBTransformImage() in the MagickCore/colorspace.c may trigger undefined behavior via a crafted image file that is submitted by an attacker processed by an application using ImageMagick. The highest threat from this vulnerability is to system availability.",
    "evidence": "osv:DEBIAN-CVE-2021-20311",
    "products": [
      {
        "name": {
          "value": "imagemagick",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8:6.9.11.60+dfsg-1.5",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "imagemagick",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8:6.9.11.60+dfsg-1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "imagemagick",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8:6.9.11.60+dfsg-1.5",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2021-20311",
      "aliases": [
        "DEBIAN-CVE-2021-20311"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8:6.9.11.60+dfsg-1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "imagemagick",
            "purl": "pkg:deb/debian/imagemagick?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20311.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8:6.9.11.60+dfsg-1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "imagemagick",
            "purl": "pkg:deb/debian/imagemagick?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20311.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8:6.9.11.60+dfsg-1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "imagemagick",
            "purl": "pkg:deb/debian/imagemagick?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20311.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        }
      ],
      "modified": "2026-10-23T18:03:10.485690565Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-20311"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2021-20311"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-20311",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 420693,
  "published_at": "2021-05-11T23:15:08.81+00:00"
}