CVE-2009-5018

Exp

Stack-based buffer overflow in gif2png.c in gif2png 2.5.3 and earlier might allow context-dependent attackers to execute arbitrary code via a long command-line argument, as demonstrated by a CGI program that launches gif2png.

Published: 2011-01-14 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-5018 is rated High Exploit Risk (73.7/100): CVSS Medium severity, with high exploitation likelihood (EPSS 22.06%, 96th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-5018

EDB-ID Source Kind Published Link
34356 exploit_db edb 2009-12-12 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-5018

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-23 23.98% 22.06% -1.92%
2 2025-05-03 23.41% 23.98% +0.57%
3 2025-03-30 — 23.41% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-5018

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2009-5018

OS Trackers for CVE-2009-5018

vendor priority summary link
gentoo normal CVE-2009-5018: 1 GLSA(s) (201101-01), 1 atom(s) (media-gfx/gif2png); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-5018
redhat low — https://access.redhat.com/security/cve/CVE-2009-5018
ubuntu medium CVE-2009-5018 medium priority: Ubuntu including 1 source packages (gif2png), 8 status rows across 8 suites (dapper, hardy, karmic, lucid, maverick, natty, oneiric, upstream): not-affected 4, ignored 3, released 1. https://ubuntu.com/security/CVE-2009-5018

Affected software / configurations for CVE-2009-5018

Vendor Product Version Raw CPE
catb gif2png <= 2.5.3 cpe:2.3:a:catb:gif2png:*:*:*:*:*:*:*:*
catb gif2png 0.99 cpe:2.3:a:catb:gif2png:0.99:*:*:*:*:*:*:*
catb gif2png 1.0.0 cpe:2.3:a:catb:gif2png:1.0.0:*:*:*:*:*:*:*
catb gif2png 1.1.0 cpe:2.3:a:catb:gif2png:1.1.0:*:*:*:*:*:*:*
catb gif2png 1.1.1 cpe:2.3:a:catb:gif2png:1.1.1:*:*:*:*:*:*:*
catb gif2png 1.2.0 cpe:2.3:a:catb:gif2png:1.2.0:*:*:*:*:*:*:*
catb gif2png 1.2.1 cpe:2.3:a:catb:gif2png:1.2.1:*:*:*:*:*:*:*
catb gif2png 1.2.2 cpe:2.3:a:catb:gif2png:1.2.2:*:*:*:*:*:*:*
catb gif2png 2.0.0 cpe:2.3:a:catb:gif2png:2.0.0:*:*:*:*:*:*:*
catb gif2png 2.0.1 cpe:2.3:a:catb:gif2png:2.0.1:*:*:*:*:*:*:*
catb gif2png 2.0.2 cpe:2.3:a:catb:gif2png:2.0.2:*:*:*:*:*:*:*
catb gif2png 2.0.3 cpe:2.3:a:catb:gif2png:2.0.3:*:*:*:*:*:*:*
catb gif2png 2.1.1 cpe:2.3:a:catb:gif2png:2.1.1:*:*:*:*:*:*:*
catb gif2png 2.1.2 cpe:2.3:a:catb:gif2png:2.1.2:*:*:*:*:*:*:*
catb gif2png 2.1.3 cpe:2.3:a:catb:gif2png:2.1.3:*:*:*:*:*:*:*
catb gif2png 2.2.0 cpe:2.3:a:catb:gif2png:2.2.0:*:*:*:*:*:*:*
catb gif2png 2.2.1 cpe:2.3:a:catb:gif2png:2.2.1:*:*:*:*:*:*:*
catb gif2png 2.2.2 cpe:2.3:a:catb:gif2png:2.2.2:*:*:*:*:*:*:*
catb gif2png 2.2.3 cpe:2.3:a:catb:gif2png:2.2.3:*:*:*:*:*:*:*
catb gif2png 2.2.4 cpe:2.3:a:catb:gif2png:2.2.4:*:*:*:*:*:*:*
catb gif2png 2.2.5 cpe:2.3:a:catb:gif2png:2.2.5:*:*:*:*:*:*:*
catb gif2png 2.3.0 cpe:2.3:a:catb:gif2png:2.3.0:*:*:*:*:*:*:*
catb gif2png 2.3.1 cpe:2.3:a:catb:gif2png:2.3.1:*:*:*:*:*:*:*
catb gif2png 2.3.2 cpe:2.3:a:catb:gif2png:2.3.2:*:*:*:*:*:*:*
catb gif2png 2.3.3 cpe:2.3:a:catb:gif2png:2.3.3:*:*:*:*:*:*:*
catb gif2png 2.4.0 cpe:2.3:a:catb:gif2png:2.4.0:*:*:*:*:*:*:*
catb gif2png 2.4.1 cpe:2.3:a:catb:gif2png:2.4.1:*:*:*:*:*:*:*
catb gif2png 2.4.2 cpe:2.3:a:catb:gif2png:2.4.2:*:*:*:*:*:*:*
catb gif2png 2.4.3 cpe:2.3:a:catb:gif2png:2.4.3:*:*:*:*:*:*:*
catb gif2png 2.4.4 cpe:2.3:a:catb:gif2png:2.4.4:*:*:*:*:*:*:*
catb gif2png 2.4.5 cpe:2.3:a:catb:gif2png:2.4.5:*:*:*:*:*:*:*
catb gif2png 2.4.6 cpe:2.3:a:catb:gif2png:2.4.6:*:*:*:*:*:*:*
catb gif2png 2.4.7 cpe:2.3:a:catb:gif2png:2.4.7:*:*:*:*:*:*:*
catb gif2png 2.5.0 cpe:2.3:a:catb:gif2png:2.5.0:*:*:*:*:*:*:*
catb gif2png 2.5.1 cpe:2.3:a:catb:gif2png:2.5.1:*:*:*:*:*:*:*
catb gif2png 2.5.2 cpe:2.3:a:catb:gif2png:2.5.2:*:*:*:*:*:*:*

References for CVE-2009-5018

URL Tags
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550978 Patch
http://bugs.gentoo.org/show_bug.cgi?id=346501
http://cvs.fedoraproject.org/viewvc/rpms/gif2png/devel/gif2png-overflow.patch?root=extras&view=log Patch
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/051229.html Patch
http://lists.grok.org.uk/pipermail/full-disclosure/2009-December/072009.html Patch
http://openwall.com/lists/oss-security/2010/11/21/1 Patch
http://openwall.com/lists/oss-security/2010/11/22/1 Patch
http://openwall.com/lists/oss-security/2010/11/22/12
http://openwall.com/lists/oss-security/2010/11/22/3
http://secunia.com/advisories/42796 Vendor Advisory
http://security.gentoo.org/glsa/glsa-201101-01.xml
http://www.mandriva.com/security/advisories?name=MDVSA-2011:009
http://www.securityfocus.com/bid/41801
http://www.vupen.com/english/advisories/2010/3036 Vendor Advisory
http://www.vupen.com/english/advisories/2011/0023 Vendor Advisory
http://www.vupen.com/english/advisories/2011/0107
https://bugzilla.redhat.com/show_bug.cgi?id=547515 Exploit Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/64820
cvelogic Threat Intelligence