CVE-2019-18277
Published: 23 October 2019
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).
Priority
Status
Package | Release | Status |
---|---|---|
haproxy Launchpad, Ubuntu, Debian |
bionic |
Released
(1.8.8-1ubuntu0.7)
|
disco |
Released
(1.8.19-1ubuntu1.2)
|
|
eoan |
Released
(2.0.5-1ubuntu0.2)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(2.0.6-1)
|
|
xenial |
Released
(1.6.3-1ubuntu0.3)
|
|
Patches: upstream: https://git.haproxy.org/?p=haproxy-2.0.git;a=commit;h=196a7df44d8129d1adc795da020b722614d6a581 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |