HAProxy 2.1-2.7 Info Leak via FCGI_BEGIN_REQUEST (CVE20230836)
CVE-2023-0836 Published on March 29, 2023
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.
Vulnerability Analysis
CVE-2023-0836 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Types
What is an Information Disclosure Vulnerability?
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVE-2023-0836 has been classified to as an Information Disclosure vulnerability or weakness.
What is an Insufficient Cleanup Vulnerability?
The software does not properly "clean up" and remove temporary or supporting resources after they have been used.
CVE-2023-0836 has been classified to as an Insufficient Cleanup vulnerability or weakness.
Products Associated with CVE-2023-0836
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.