Remote No

Type Information disclosure

Description

The waitid implementation in kernel/exit.c in the Linux kernel through 4.13.4 accesses rusage data structures in unintended cases, which allows local users to obtain sensitive information, and bypass the KASLR protection mechanism, via a crafted system call.

AVG-431 linux-lts 4.9.55-1 4.9.56-1 Medium Not affected

AVG-430 linux-hardened 4.13.4.a-1 4.13.5.a-1 Medium Fixed

AVG-429 linux-zen 4.13.4-1 4.13.5-1 Medium Fixed

AVG-428 linux 4.13.4-1 4.13.5-1 Medium Fixed

https://github.com/torvalds/linux/commit/6c85501f2fabcfc4fc6ed976543d252c4eaf4be9
https://grsecurity.net/~spender/exploits/wait_for_kaslr_to_be_effective.c

Introduced in https://github.com/torvalds/linux/commit/7e95a225901a5d2fd140f14b4302805cecc22da7