| Name | CVE-2021-40346 |
| Description | An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs. |
| 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-4968-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| haproxy (PTS) | jessie, jessie (lts) | 1.5.8-3+deb8u4 | fixed |
| stretch (security) | 1.7.5-2+deb9u1 | fixed |
| stretch (lts), stretch | 1.7.5-2+deb9u2 | fixed |
| buster (security), buster, buster (lts) | 1.8.19-1+deb10u5 | fixed |
| bullseye (security), bullseye | 2.2.9-2+deb11u6 | fixed |
| bookworm (security), bookworm | 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 | jessie | (not affected) | | | |
| haproxy | source | stretch | (not affected) | | | |
| haproxy | source | buster | (not affected) | | | |
| haproxy | source | bullseye | 2.2.9-2+deb11u2 | | DSA-4968-1 | |
| haproxy | source | (unstable) | 2.2.16-3 | | | |
Notes
[buster] - haproxy <not-affected> (Vulnerable code not present)
[stretch] - haproxy <not-affected> (Vulnerable code not present)
https://www.mail-archive.com/haproxy@formilux.org/msg41114.html
https://git.haproxy.org/?p=haproxy.git;a=commit;h=3b69886f7dcc3cfb3d166309018e6cfec9ce2c95
[jessie] - haproxy <not-affected> (Vulnerable code not present)