CVE-2010-4180

medium

Published 2010-12-06 · 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

4.3

Description

OpenSSL before 0.9.8q, and 1.0.x before 1.0.0c, when SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG is enabled, does not properly prevent modification of the ciphersuite in the session cache, which allows remote attackers to force the downgrade to an unintended cipher via vectors involving sniffing network traffic to discover a session identifier.

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

Fedora Affected 2 releases

Version	Status	Fixed in
14	Affected	—
13	Affected	—

SUSE Affected 7 releases

Version	Status	Fixed in
11.4	Affected	—
11.3	Affected	—
11.2	Affected	—
11.1	Affected	—
11	Affected	—
10	Affected	—
9	Affected	—

Ubuntu Affected 5 releases

Version	Status	Fixed in
10.10	Affected	—
10.04	Affected	—
9.04	Affected	—
8.04	Affected	—
6.06	Affected	—

Debian Mixed 6 releases

Version	Status	Fixed in
trixie	Fixed	`0.9.8o-4`
sid	Fixed	`0.9.8o-4`
forky	Fixed	`0.9.8o-4`
bullseye	Fixed	`0.9.8o-4`
bookworm	Fixed	`0.9.8o-4`
5.0	Affected	—

Application impact

Vendor	Product	Versions	Fixed
openssl	openssl	`{"endExcluding":"0.9.8q"}`	`0.9.8q`
f5	nginx	`{"endExcluding":"0.9.2"}`	`0.9.2`
nginx	nginx	`{"endExcluding":"0.9.2"}`	`0.9.2`

References

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

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