CVE-2012-5843

critical

Published 2012-11-21 · 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

9.3

Description

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Predictions

Exploit likelihood

20%

Patch ETA

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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.

OS impact

SUSE Affected 5 releases

Version	Status	Fixed in
12.2	Affected	—
12.1	Affected	—
11.4	Affected	—
11	Affected	—
10	Affected	—

Ubuntu Affected 4 releases

Version	Status	Fixed in
12.10	Affected	—
12.04	Affected	—
11.10	Affected	—
10.04	Affected	—

Application impact

Vendor	Product	Versions	Fixed
mozilla	firefox	`{"endExcluding":"10.0.11"}`	`10.0.11`
mozilla	seamonkey	`{"endExcluding":"2.14"}`	`2.14`
mozilla	thunderbird	`{"endExcluding":"17.0"}`	`17.0`
mozilla	thunderbird_esr	`{"endExcluding":"10.0.11"}`	`10.0.11`

References

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

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