Published: 23/10/2019 Updated: 07/11/2023

CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 384

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

A flaw was found in HAProxy prior to 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).

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haproxy haproxy

HAproxy would allow unintended access if ii received specially crafted HTTP request ...

Synopsis Moderate: haproxy security, bug fix, and enhancement update Type/Severity Security Advisory: Moderate Topic An update for haproxy is now available for Red Hat Enterprise Linux 8Red Hat Product Security has rated this update as having a security impact of Moderate A Common Vulnerability Scoring Sy ...

Synopsis Critical: OpenShift Container Platform 311 security update Type/Severity Security Advisory: Critical Topic Red Hat OpenShift Container Platform release 311200 is now available withupdates to packages and images that fix several bugsRed Hat Product Security has rated this update as having a secu ...

Synopsis Moderate: rh-haproxy18-haproxy security, bug fix, and enhancement update Type/Severity Security Advisory: Moderate Topic An update for rh-haproxy18-haproxy is now available for Red Hat Software CollectionsRed Hat Product Security has rated this update as having a security impact of Moderate A Com ...

Awesome-HTTPRequestSmuggling A curated list of awesome research about HTTP request smuggling attacks Feel free to contribute! 🍻 Blogs HTTP Request Smuggling - The original research by Watchfire HTTP Desync Attacks: Request Smuggling Reborn - By James Kettle HTTP Desync Attacks: what happened next - By James Kettle Breaking the chains on HTTP Request Smuggler - By Jam

A curated list of awesome blogs and tools about HTTP request smuggling attacks. Feel free to contribute! 🍻

Awesome-HTTPRequestSmuggling A curated list of awesome research about HTTP request smuggling attacks Feel free to contribute! 🍻 Blogs HTTP Request Smuggling - The original research by Watchfire HTTP Desync Attacks: Request Smuggling Reborn - By James Kettle HTTP Desync Attacks: what happened next - By James Kettle Breaking the chains on HTTP Request Smuggler - By Jam

CWE-444 https://nathandavison.com/blog/haproxy-http-request-smuggling https://usn.ubuntu.com/4174-1/http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00016.html http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00019.html https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html https://www.mail-archive.com/haproxy%40formilux.org/msg34926.html https://git.haproxy.org/?p=haproxy-2.0.git%3Ba=commit%3Bh=196a7df44d8129d1adc795da020b722614d6a581 https://usn.ubuntu.com/4174-1/https://nvd.nist.gov

CVE-2019-18277

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