Description
The do_check function in kernel/bpf/verifier.c in the Linux kernel before 4.11.1 does not make the allow_ptr_leaks value available for restricting the output of the print_bpf_insn function, which allows local users to obtain sensitive address information via crafted bpf system calls.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- https://www.exploit-db.com/exploits/42048/ ↗
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d0e57697f162da4aa218b5feafe614fb666db07 ↗
- https://source.android.com/security/bulletin/2017-09-01 ↗
- https://github.com/torvalds/linux/commit/0d0e57697f162da4aa218b5feafe614fb666db07 ↗
- http://www.securityfocus.com/bid/98635 ↗
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1251 ↗
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.1 ↗