CVE-2023-25725 — HTTP Request Smuggling in Haproxy
Severity
9.1CRITICALNVD
EPSS
20.0%
top 4.51%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedFeb 14
Latest updateDec 3
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 …
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HExploitability: 3.9 | Impact: 5.2
Affected Packages9 packages
Also affects: Debian Linux 10.0, 11.0
🔴Vulnerability Details
2📋Vendor Advisories
4Microsoft▶
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 ↗2023-02-14
Debian▶
CVE-2023-25725: haproxy - HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers...↗2023