Company
Date Published
Author
Ben Gross, Security Researcher
Word count
2142
Language
English
Hacker News points
None

Summary

On July 24, 2024, a new stack buffer Use After Free (UAF) vulnerability, CVE-2024-6197, was announced by Curl maintainers, affecting versions 8.6.0 through 8.8.0 of the Curl command-line tool and Libcurl. This vulnerability, although rare since UAF issues typically occur on the heap, could be exploited to cause a denial of service but is considered nearly impossible to exploit for remote code execution in real-world scenarios. The exploitation requires specific conditions, such as the use of particular TLS backends and the CURLINFO_CERTINFO flag. While certain Linux distributions like Alpine 3.10 might not crash when this vulnerability is triggered, most others, including Ubuntu and Debian, will crash due to their libc implementations. Despite the potential for denial of service, the vulnerability is unlikely to facilitate remote code execution due to mitigations present in most Linux distributions. Upgrading to Curl 8.9.0 or patched versions provided by Linux distributions is recommended to address this issue, and tools like JFrog Xray can help identify vulnerable instances.