Bug 2180746 (CVE-2023-0836) - CVE-2023-0836 haproxy: data leak via fcgi requests
Summary: CVE-2023-0836 haproxy: data leak via fcgi requests
Keywords:
Status: NEW
Alias: CVE-2023-0836
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2180759 2180860 2180861 2180862
Blocks: 2169886 2180758
TreeView+ depends on / blocked
 
Reported: 2023-03-22 07:56 UTC by Avinash Hanwate
Modified: 2023-11-07 08:18 UTC (History)
16 users (show)

Fixed In Version: HAProxy 2.8, HAProxy 2.7.1, HAProxy 2.6.8, HAProxy 2.5.11, HAProxy 2.4.21, HAProxy 2.2.27
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in HAProxy, which could allow a remote attacker to obtain sensitive information caused by improper initialization when encoding the FCGI_BEGIN_REQUEST record. By sending a specially crafted request, an attacker could exploit this vulnerability to obtain sensitive information and use this information to launch further attacks against the affected system.
Clone Of:
Environment:
Last Closed:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:6496 0 None None None 2023-11-07 08:18:21 UTC

Description Avinash Hanwate 2023-03-22 07:56:03 UTC 
An information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.5 before 2.5.11, 2.6 before 2.6.8,
2.7 before 2.7.1. There are 5 bytes left uninitialized in the connection buffer when encoding the FCGI_BEGIN_REQUEST record. Sensitive data may be disclosed to configured FastCGI backends in an unexpected way.

https://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=2e6bf0a
Comment 5 errata-xmlrpc 2023-11-07 08:18:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6496 https://access.redhat.com/errata/RHSA-2023:6496
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