VDB-246323 · CVE-2023-45539 · DLA 3688-1

HAProxy up to 2.8.1 path_end Rule access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in HAProxy up to 2.8.1. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component path_end Rule Handler. The manipulation leads to access control. This vulnerability is listed as CVE-2023-45539. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in HAProxy up to 2.8.1 (Firewall Software). This issue affects an unknown function of the component path_end Rule Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented 11/29/2023. It is possible to read the advisory at git.haproxy.org. The identification of this vulnerability is CVE-2023-45539 since 10/09/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 210356 (RHEL 8 : haproxy (RHSA-2024:8849)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.8.2 eliminates this vulnerability. Applying the patch 2eab6d354322932cfec2ed54de261e4347eca9a6 is able to eliminate this problem. The bugfix is ready for download at git.haproxy.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (210356) and CERT Bund (WID-SEC-2023-3019). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
HAProxy HAProxy
RESF Rocky Linux

Productinfo

Type

Firewall Software

Name

HAProxy

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CNA Base Score: 8.2
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 210356
Nessus Name: RHEL 8 : haproxy (RHSA-2024:8849)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: HAProxy 2.8.2
Patch: 2eab6d354322932cfec2ed54de261e4347eca9a6

Timelineinfo

10/09/2023 🔍
11/29/2023 +51 days 🔍
11/29/2023 +0 days 🔍
08/27/2025 +637 days 🔍

Sourcesinfo

Advisory: DLA 3688-1
Status: Confirmed

CVE: CVE-2023-45539 (🔍)
GCVE (CVE): GCVE-0-2023-45539
GCVE (VulDB): GCVE-100-246323
CERT Bund: WID-SEC-2023-3019 - HAProxy Enterprise: Schwachstelle ermöglicht Offenlegung von Informationen

Entryinfo

Created: 11/29/2023 06:45
Updated: 08/27/2025 19:23
Changes: 11/29/2023 06:45 (42), 12/20/2023 08:12 (1), 12/20/2023 08:13 (11), 10/16/2024 06:05 (27), 11/06/2024 02:12 (2), 08/27/2025 19:23 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.