CyberRota Analysis
AI-GeneratedThe imhttp module of Rsyslog versions 8.2110.0 to 8.2604.0 is vulnerable due to improper handling of oversized HTTP Basic Authorization credentials, which can lead to heap memory corruption and process crashes. This vulnerability poses a significant risk to systems utilizing Basic Authentication with the imhttp module, allowing unauthenticated remote attackers to disrupt log collection. Organizations using affected versions with this configuration should prioritize upgrading to version 8.2604.0 or later to mitigate potential disruptions.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Rsyslog is a rocket-fast system for log processing. From 8.2110.0 until 8.2604.0, the optional imhttp module's parse_auth_header function in contrib/imhttp/imhttp.c allocates a zero-byte heap buffer with calloc(0, len) when an HTTP Basic Authorization value exceeds its fixed work buffer, then passes that pointer to apr_base64_decode. An unauthenticated remote attacker can send an oversized encoded credential to an imhttp endpoint configured for Basic Authentication, causing decoded data to overwrite adjacent heap memory before credential validation. Deployments that do not install, load, and use imhttp with Basic Authentication are not affected. The demonstrated impact is a process crash that interrupts log collection, and code execution has not been demonstrated. This issue is fixed in version 8.2604.0.