{
  "modified": "2025-08-09T19:01:26Z",
  "published": "2009-03-02T20:30:00Z",
  "id": "CVE-2009-0749",
  "details": "Use-after-free vulnerability in the GIFReadNextExtension function in lib/pngxtern/gif/gifread.c in OptiPNG 0.6.2 and earlier allows context-dependent attackers to cause a denial of service (application crash) via a crafted GIF image that causes the realloc function to return a new pointer, which triggers memory corruption when the old pointer is accessed.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/34035"
    },
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/34201"
    },
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/34259"
    },
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/35685"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.gentoo.org/security/en/glsa/glsa-200903-12.xml"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.securityfocus.com/bid/33873"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.vupen.com/english/advisories/2009/0510"
    },
    {
      "type": "ADVISORY",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/48879"
    },
    {
      "type": "ARTICLE",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00001.html"
    },
    {
      "type": "ARTICLE",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html"
    },
    {
      "type": "ARTICLE",
      "url": "http://www.openwall.com/lists/oss-security/2009/02/24/2"
    },
    {
      "type": "ARTICLE",
      "url": "http://www.openwall.com/lists/oss-security/2009/02/25/4"
    },
    {
      "type": "FIX",
      "url": "http://www.securityfocus.com/bid/33873"
    },
    {
      "type": "FIX",
      "url": "http://www.vupen.com/english/advisories/2009/0510"
    },
    {
      "type": "REPORT",
      "url": "http://sourceforge.net/tracker/index.php?func=detail\u0026aid=2582013\u0026group_id=151404\u0026atid=780913"
    },
    {
      "type": "WEB",
      "url": "http://optipng.sourceforge.net"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/33873"
    }
  ]
}