Bug 1454647 (CVE-2017-9150) - CVE-2017-9150 kernel: eBPF verifier log leaks lower half of map pointer
Summary: CVE-2017-9150 kernel: eBPF verifier log leaks lower half of map pointer
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-9150
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1454648 1461952
Blocks: 1454650
TreeView+ depends on / blocked
 
Reported: 2017-05-23 09:04 UTC by Adam Mariš
Modified: 2021-02-17 02:07 UTC (History)
38 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
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.
Clone Of:
Environment:
Last Closed: 2017-06-13 16:24:28 UTC
Embargoed:

Attachments (Terms of Use)

Description Adam Mariš 2017-05-23 09:04:45 UTC 
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 kernel information address information via crafted bpf system calls.

Upstream patch:

https://github.com/torvalds/linux/commit/0d0e57697f162da4aa218b5feafe614fb666db07

External References:

https://packetstormsecurity.com/files/142630/GS20170523000807.txt
Comment 1 Adam Mariš 2017-05-23 09:05:28 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1454648]
Comment 2 Wade Mealing 2017-05-30 02:36:45 UTC 
Statement:
Comment 3 Wade Mealing 2017-05-30 02:37:07 UTC 
Statement:

This issue did not affect the versions of the kernel as shipped with Red Hat Enterprise Linux 5, 6,7 and MRG2/realtime kernels.
Comment 6 Justin M. Forbes 2017-05-30 14:39:11 UTC 
This issue was resolved with the 4.11.1 and newer kernels for Fedora
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