Bug 651671 (CVE-2010-4169) - CVE-2010-4169 kernel: perf bug
Summary: CVE-2010-4169 kernel: perf bug
Alias: CVE-2010-4169
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
: 651669 651670 (view as bug list)
Depends On: 651672 651673 651674
TreeView+ depends on / blocked
Reported: 2010-11-10 03:58 UTC by Eugene Teo (Security Response)
Modified: 2021-02-24 17:05 UTC (History)
14 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2015-07-29 13:15:39 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0958 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2010-12-08 19:08:55 UTC
Red Hat Product Errata RHSA-2011:0283 0 normal SHIPPED_LIVE Moderate: kernel security, bug fix, and enhancement update 2011-02-22 17:38:22 UTC

Description Eugene Teo (Security Response) 2010-11-10 03:58:31 UTC
Description of problem:
Upstream commit dab5855 ("perf_counter: Add mmap event hooks to mprotect()") is fundamentally wrong as mprotect_fixup() can free 'vma' due to merging. Fix the problem by moving perf_event_mmap() hook to mprotect_fixup(). In certain scenario, a local, unprivileged user could use this flaw to trigger a denial of service.

Upstream commit:

Comment 6 Eugene Teo (Security Response) 2010-11-10 04:09:10 UTC
*** Bug 651669 has been marked as a duplicate of this bug. ***

Comment 9 Eugene Teo (Security Response) 2010-11-10 07:46:05 UTC
*** Bug 651670 has been marked as a duplicate of this bug. ***

Comment 10 Eugene Teo (Security Response) 2010-11-16 06:53:17 UTC

The Linux kernel as shipped with Red Hat Enterprise Linux 3, 4 and 5 did not backport the upstream commit dab5855 that introduced the issue. Future kernel updates in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG may address this flaw.

Comment 11 errata-xmlrpc 2010-12-08 19:09:44 UTC
This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2010:0958 https://rhn.redhat.com/errata/RHSA-2010-0958.html

Comment 12 errata-xmlrpc 2011-02-22 17:38:36 UTC
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0283 https://rhn.redhat.com/errata/RHSA-2011-0283.html

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