CVE-2015-3420

medium

Published 2017-09-19 · Modified 2026-05-13

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

5.9

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

5.9

Description

The ssl-proxy-openssl.c function in Dovecot before 2.2.17, when SSLv3 is disabled, allow remote attackers to cause a denial of service (login process crash) via vectors related to handshake failures.

Predictions

Exploit likelihood

69%

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.

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`1:2.2.13-12`
debian	bullseye	fixed	`1:2.2.13-12`
debian	forky	fixed	`1:2.2.13-12`
debian	sid	fixed	`1:2.2.13-12`
debian	trixie	fixed	`1:2.2.13-12`
fedora	20	affected
fedora	21	affected
fedora	22	affected

Application impact

Vendor	Product	Versions	Fixed
dovecot	dovecot	`{"endIncluding":"2.2.16"}`

References

CWEs

CWE-295

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

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