CVE-2023-25824: mod_gnutls contains Infinite Loop on request read timeout
Modgnutls is a TLS module for Apache HTTPD based on GnuTLS. Versions from 0.9.0 to 0.12.0 (including) did not properly fail blocking read operations on TLS connections when the transport hit timeouts. Instead it entered an endless loop retrying the read operation, consuming CPU resources. This could be exploited for denial of service attacks. If trace level logging was enabled, it would also produce an excessive amount of log output during the loop, consuming disk space. The problem has been fixed in commit d7eec4e598158ab6a98bf505354e84352f9715ec, please update to version 0.12.1. There are no workarounds, users who cannot update should apply the errno fix detailed in the security advisory.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2023-25824?
CVE-2023-25824 is considered a high severity vulnerability due to its potential to cause CPU resource exhaustion on affected systems.
How do I fix CVE-2023-25824?
To fix CVE-2023-25824, you should upgrade mod_gnutls to version 0.12.1 or later.
What systems are affected by CVE-2023-25824?
CVE-2023-25824 affects mod_gnutls versions from 0.9.0 to 0.12.0, specifically when used with Apache HTTPD.
What is mod_gnutls and how is it related to CVE-2023-25824?
Mod_gnutls is a TLS module for Apache HTTPD that, in certain versions, can enter an endless loop during read operations under timeout conditions.
What are the potential impacts of CVE-2023-25824?
The potential impacts of CVE-2023-25824 include service denial due to excessive CPU usage, leading to degraded performance or downtime.