| Name | CVE-2019-18277 |
| Description | A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3034-1, ELA-626-1 |
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 | 2.9.11-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| haproxy | source | wheezy | (unfixed) | end-of-life | ||
| haproxy | source | jessie | 1.5.8-3+deb8u3 | ELA-626-1 | ||
| haproxy | source | stretch | 1.7.5-2+deb9u1 | DLA-3034-1 | ||
| haproxy | source | buster | 1.8.19-1+deb10u3 | |||
| haproxy | source | (unstable) | 2.0.6-1 |
[jessie] - haproxy <no-dsa> (Minor issue)
https://git.haproxy.org/?p=haproxy-2.0.git;a=commit;h=196a7df44d8129d1adc795da020b722614d6a581
https://nathandavison.com/blog/haproxy-http-request-smuggling