CVE-2017-9150
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or โ if you've already worked around this in production โ publish your fix to the community-verified tier.
โ Propose a mitigation on Community โ Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Linux Kernel 4.11 - eBPF Verifier Log Leaks Lower Half of map Pointer
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 4.9.30-1 |
| debian | bullseye | fixed | 4.9.30-1 |
| debian | forky | fixed | 4.9.30-1 |
| debian | sid | fixed | 4.9.30-1 |
| debian | trixie | fixed | 4.9.30-1 |
| linux-kernel | affected | |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d0e57697f162da4aa218b5feafe614fb666db07
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.1
- http://www.securityfocus.com/bid/98635
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1251
- https://github.com/torvalds/linux/commit/0d0e57697f162da4aa218b5feafe614fb666db07
- https://source.android.com/security/bulletin/2017-09-01
- https://www.exploit-db.com/exploits/42048/
- https://www.suse.com/security/cve/CVE-2017-9150.html
- https://security-tracker.debian.org/tracker/CVE-2017-9150
CWEs
CWE-200
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.