CVE-2011-3658

high

Published 2011-12-21 · Modified 2026-04-29

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

8.5

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.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-18847 remote windows verified

Metasploit · 2012-05-09

Mozilla Firefox 7 / 8 < 8.0.1 - nsSVGValue Out-of-Bounds Access (Metasploit)

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_windows/browser/mozilla_nssvgvalue rank 200

Firefox nsSVGValue Out-of-Bounds Access Vulnerability

Source fetch failed: fetch_error — view the original via the link above.

Application impact

Vendor	Product	Versions
mozilla	firefox	`8.0`
mozilla	seamonkey	`2.5`
mozilla	thunderbird	`8.0`

References

CWEs

CWE-399

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.