CVE-2023-45539

haproxy: untrimmed URI fragments may lead to exposure of confidential data on static servers

Severity Score

8.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

HAProxy anterior a 2.8.2 acepta # como parte del componente URI, lo que podría permitir a atacantes remotos obtener información confidencial o tener otro impacto no especificado tras una mala interpretación de una regla path_end, como enrutar index.html#.png a un servidor estático.

An update for haproxy is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-10-09 CVE Reserved
2023-11-28 CVE Published
2024-10-15 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-116: Improper Encoding or Escaping of Output
CWE-288: Authentication Bypass Using an Alternate Path or Channel

CAPEC

References (6)

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

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-45539	2024-11-19
https://bugzilla.redhat.com/show_bug.cgi?id=2253037	2024-11-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Haproxy Search vendor "Haproxy"		Haproxy Search vendor "Haproxy" for product "Haproxy"				< 2.8.2 Search vendor "Haproxy" for product "Haproxy" and version " < 2.8.2"		-		Affected