cve/2023/CVE-2023-6779.md

CVE-2023-6779

Description

An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.

POC

Reference

• http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
• http://seclists.org/fulldisclosure/2024/Feb/3
• https://www.openwall.com/lists/oss-security/2024/01/30/6
• https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt

Github

• https://github.com/fkie-cad/nvd-json-data-feeds
• https://github.com/testing-felickz/docker-scout-demo