CVE-2023-0836 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Haproxy	Haproxy
Redhat	Enterprise Linux

Configuration 1 [-]

OR	cpe:2.3:a:haproxy:haproxy::::::::
	cpe:2.3:a:haproxy:haproxy::::::::
	cpe:2.3:a:haproxy:haproxy::::::::
	cpe:2.3:a:haproxy:haproxy::::::::
	cpe:2.3:a:haproxy:haproxy:2.1.0:::::::*
	cpe:2.3:a:haproxy:haproxy:2.3.0:::::::*
	cpe:2.3:a:haproxy:haproxy:2.7.0:::::::*

Package	CPE	Advisory	Released Date
Red Hat Enterprise Linux 9
haproxy-0:2.4.22-1.el9	cpe:/a:redhat:enterprise_linux:9	RHSA-2023:6496	2023-11-07T00:00:00Z

References

Link	Providers
https://git.haproxy.org/?p=haproxy.git%3Ba=commitdiff%3Bh=2e6bf0a
https://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=2e6bf0a
https://nvd.nist.gov/vuln/detail/CVE-2023-0836
https://www.cve.org/CVERecord?id=CVE-2023-0836
https://www.debian.org/security/2023/dsa-5388

History

Tue, 18 Feb 2025 17:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2023-03-29T00:00:00.000Z

Updated: 2025-02-18T16:42:03.756Z

Reserved: 2023-02-14T00:00:00.000Z

Link: CVE-2023-0836

Vulnrichment

Updated: 2024-08-02T05:24:34.530Z

NVD

Status : Modified

Published: 2023-03-29T21:15:07.950

Modified: 2025-02-18T17:15:15.600

Link: CVE-2023-0836

Redhat

Severity : Moderate

Publid Date: 2022-12-09T00:00:00Z

Links: CVE-2023-0836 - Bugzilla

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{"acknowledgement": "Red Hat would like to thank Youfu Zhang (Chaitin Security Research Lab) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2023:6496", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "haproxy-0:2.4.22-1.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}], "bugzilla": {"description": "haproxy: data leak via fcgi requests", "id": "2180746", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2180746"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "verified"}, "cwe": "CWE-459", "details": ["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.", "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."], "name": "CVE-2023-0836", "package_state": [{"cpe": "cpe:/a:redhat:ceph_storage:5", "fix_state": "Affected", "package_name": "haproxy", "product_name": "Red Hat Ceph Storage 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:openshift:3.11", "fix_state": "Out of support scope", "package_name": "haproxy", "product_name": "Red Hat OpenShift Container Platform 3.11"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Will not fix", "package_name": "haproxy", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Will not fix", "package_name": "rh-haproxy18-haproxy", "product_name": "Red Hat Software Collections"}], "public_date": "2022-12-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-0836\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-0836\nhttps://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=2e6bf0a"], "threat_severity": "Moderate", "upstream_fix": "HAProxy 2.8, HAProxy 2.7.1, HAProxy 2.6.8, HAProxy 2.5.11, HAProxy 2.4.21, HAProxy 2.2.27"}