CVEs-PoC/2009/CVE-2009-1897.md

CVE-2009-1897

Description

The tun_chr_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894.

POC

Reference

• http://isc.sans.org/diary.html?storyid=6820
• https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations

Github

• https://github.com/christian-byrne/custom-nodes-security-scan
• https://github.com/christian-byrne/node-sec-scan
• https://github.com/xairy/linux-kernel-exploitation