| Name | CVE-2015-3420 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 783649 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| dovecot (PTS) | jessie, jessie (lts) | 1:2.2.13-12~deb8u9 | fixed |
| stretch (security) | 1:2.2.27-3+deb9u7 | fixed |
| stretch (lts), stretch | 1:2.2.27-3+deb9u8 | fixed |
| buster, buster (lts) | 1:2.3.4.1-5+deb10u8 | fixed |
| buster (security) | 1:2.3.4.1-5+deb10u7 | fixed |
| bullseye | 1:2.3.13+dfsg1-2+deb11u1 | fixed |
| bullseye (security) | 1:2.3.13+dfsg1-2+deb11u2 | fixed |
| bookworm (security), bookworm | 1:2.3.19.1+dfsg1-2.1+deb12u1 | fixed |
| sid, trixie | 1:2.3.21.1+dfsg1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| dovecot | source | squeeze | (not affected) | | | |
| dovecot | source | wheezy | (not affected) | | | |
| dovecot | source | jessie | 1:2.2.13-12~deb8u1 | | | |
| dovecot | source | (unstable) | 1:2.2.13-12 | | | 783649 |
Notes
[wheezy] - dovecot <not-affected> (Problematic patch introducing the issue not applied)
[squeeze] - dovecot <not-affected> (Vulnerable code not present & not reproducible)
https://www.openwall.com/lists/oss-security/2015/04/26/3
Patch: http://web.archive.org/web/20150907231530/http://hg.dovecot.org/dovecot-2.2/rev/86f535375750
Segfault reproducible if using openssl/1.0.2a-1 from sid.
http://dovecot.org/pipermail/dovecot/2015-April/100579.html
It is openssl crashing but because dovecot ignores an erlier
returned error from dovecot, related to openssl bug:
https://rt.openssl.org/Ticket/Display.html?id=3818&user=guest&pass=guest
Possibly introduced due to http://web.archive.org/web/20150121182933/http://hg.dovecot.org:80/dovecot-2.2/rev/09d3c9c6f0ad