Bug 1454647 (CVE-2017-9150)

Summary:	CVE-2017-9150 kernel: eBPF verifier log leaks lower half of map pointer
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, aquini, bhu, blc, dhoward, esammons, fhrbata, gansalmon, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, mlangsdo, nmurray, pholasek, plougher, rt-maint, rvrbovsk, slawomir, vdronov, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-06-13 16:24:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1454648, 1461952
Bug Blocks:	1454650

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