HTTP Request Smuggling Affecting haproxy package, versions <1.8.19-1+deb10u3
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Test your applications- Snyk ID SNYK-DEBIAN10-HAPROXY-474258
- published 24 Oct 2019
- disclosed 23 Oct 2019
Introduced: 23 Oct 2019
CVE-2019-18277 Open this link in a new tabHow to fix?
Upgrade Debian:10 haproxy to version 1.8.19-1+deb10u3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream haproxy package and not the haproxy package as distributed by Debian.
See How to fix? for Debian:10 relevant fixed versions and status.
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).
References
- https://security-tracker.debian.org/tracker/CVE-2019-18277
- https://git.haproxy.org/?p=haproxy-2.0.git;a=commit;h=196a7df44d8129d1adc795da020b722614d6a581
- https://nathandavison.com/blog/haproxy-http-request-smuggling
- https://www.mail-archive.com/haproxy@formilux.org/msg34926.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00016.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00019.html
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-18277
- https://usn.ubuntu.com/4174-1/
- https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html
- https://git.haproxy.org/?p=haproxy-2.0.git%3Ba=commit%3Bh=196a7df44d8129d1adc795da020b722614d6a581
- https://www.mail-archive.com/haproxy%40formilux.org/msg34926.html