CVE-2023-45539

Description

HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have unspecified other impact upon misinterpretation of a path_end rule, such as routing index.html#.png to a static server.

CVSS Metrics

• v3.1•HIGH•Score: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

EPSS Trends

Current EPSS score: 0.03%• Percentile: 8%

Techniques & Countermeasures

• CWE-116•Improper Encoding or Escaping of Output

  The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

Affected Systems

• haproxy•haproxy

  < 2.8.2

References (4)

• https://lists.w3.org/Archives/Public/ietf-http-wg/2023JulSep/0070.html
• https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=2eab6d354322932cfec2ed54de261e4347eca9a6
• https://www.mail-archive.com/haproxy%40formilux.org/msg43861.html
• https://lists.debian.org/debian-lts-announce/2023/12/msg00010.html