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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Description
HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.
Metrics
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vector strings. CVSS information contributed by other sources is also
displayed.
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OR
*cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.31
*cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions from (including) 2.1.0 up to (excluding) 2.2.29
*cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions from (including) 2.3.0 up to (excluding) 2.4.22
*cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions from (including) 2.5.0 up to (excluding) 2.5.12
*cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions from (including) 2.6.0 up to (excluding) 2.
Added
CPE Configuration
OR
*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Changed
Reference Type
https://git.haproxy.org/?p=haproxy-2.7.git;a=commit;h=a0e561ad7f29ed50c473f5a9da664267b60d1112 No Types Assigned