CVEs-PoC/2021/CVE-2021-3679.md

CVE-2021-3679

Description

A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.

POC

Reference

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/aegistudio/RingBufferDetonator
• https://github.com/nomi-sec/PoC-in-GitHub