CVE-2009-0749

Name: CVE-2009-0749
Creator: NVD / NIST
Published: 2009-03-02T20:30:00.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.55%

Last modified Jun 16, 2026

CVE-2009-0749 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 1.55% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

1.55%

72.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Optipng Project	Optipng	<= 0.6.2
Opensuse	Opensuse	>= 10.3, <= 11.1
Suse	Linux Enterprise	9-11

References

http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00001.htmlMailing List
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.htmlMailing List
http://optipng.sourceforge.netProduct
http://secunia.com/advisories/34035Broken Link, Vendor Advisory
http://secunia.com/advisories/34201Broken Link
http://secunia.com/advisories/34259Broken Link
http://secunia.com/advisories/35685Broken Link
http://sourceforge.net/tracker/index.php?func=detail&aid=2582013&group_id=151404&atid=780913Issue Tracking
http://www.gentoo.org/security/en/glsa/glsa-200903-12.xmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2009/02/24/2Mailing List
http://www.openwall.com/lists/oss-security/2009/02/25/4Mailing List
http://www.securityfocus.com/bid/33873Broken Link, Patch, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2009/0510Broken Link, Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/48879Third Party Advisory, VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00001.htmlMailing List
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.htmlMailing List
http://optipng.sourceforge.netProduct
http://secunia.com/advisories/34035Broken Link, Vendor Advisory
http://secunia.com/advisories/34201Broken Link
http://secunia.com/advisories/34259Broken Link
http://secunia.com/advisories/35685Broken Link
http://sourceforge.net/tracker/index.php?func=detail&aid=2582013&group_id=151404&atid=780913Issue Tracking
http://www.gentoo.org/security/en/glsa/glsa-200903-12.xmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2009/02/24/2Mailing List
http://www.openwall.com/lists/oss-security/2009/02/25/4Mailing List
http://www.securityfocus.com/bid/33873Broken Link, Patch, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2009/0510Broken Link, Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/48879Third Party Advisory, VDB Entry

Timeline

Published: Mar 2, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-0749?

How severe is CVE-2009-0749?

CVE-2009-0749 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.55% probability of exploitation in the next 30 days.

How do I fix CVE-2009-0749?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-0749?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST