| Name | CVE-2023-0836 |
| Description | An information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.5 before 2.5.11, 2.6 before 2.6.8, 2.7 before 2.7.1. There are 5 bytes left uninitialized in the connection buffer when encoding the FCGI_BEGIN_REQUEST record. Sensitive data may be disclosed to configured FastCGI backends in an unexpected way. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5388-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| haproxy (PTS) | bullseye (security), bullseye | 2.2.9-2+deb11u6 | fixed |
| bookworm, bookworm (security) | 2.6.12-1+deb12u1 | fixed | |
| sid, trixie | 2.9.12-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| haproxy | source | buster | (not affected) | |||
| haproxy | source | bullseye | 2.2.9-2+deb11u5 | DSA-5388-1 | ||
| haproxy | source | (unstable) | 2.6.8-1 |
[buster] - haproxy <not-affected> (Vulnerable code introduced later)
https://git.haproxy.org/?p=haproxy.git;a=commit;h=2e6bf0a2722866ae0128a4392fa2375bd1f03ff8
https://git.haproxy.org/?p=haproxy-2.6.git;a=commit;h=f988992d16f45ef03d5bbb024a1042ed8123e4c5 (v2.6.8)
https://git.haproxy.org/?p=haproxy-2.2.git;a=commit;h=18575ba4e5057afdb80cc06135272889ae1fa2d1 (v2.2.27)
Introduced by: https://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=63bbf284a131de362ad5b60d64ff3b1eff830553 (v2.1-dev2)