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Bug 1454647 - (CVE-2017-9150) CVE-2017-9150 kernel: eBPF verifier log leaks lower half of map pointer
CVE-2017-9150 kernel: eBPF verifier log leaks lower half of map pointer
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170508,repor...
: Security
Depends On: 1454648 1461952
Blocks: 1454650
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Reported: 2017-05-23 05:04 EDT by Adam Mariš
Modified: 2017-06-19 07:35 EDT (History)
38 users (show)

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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.
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Environment:
Last Closed: 2017-06-13 12:24:28 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2017-05-23 05:04:45 EDT 
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 05:05:28 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1454648]
Comment 2 Wade Mealing 2017-05-29 22:36:45 EDT 
Statement:
Comment 3 Wade Mealing 2017-05-29 22:37:07 EDT 
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 10:39:11 EDT 
This issue was resolved with the 4.11.1 and newer kernels for Fedora
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