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Bug 1148777 - (CVE-2014-7283) CVE-2014-7283 kernel: xfs: directory hash ordering denial of service
CVE-2014-7283 kernel: xfs: directory hash ordering denial of service
Status: CLOSED ERRATA
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=20141002,repor...
: Security
Depends On: 1148779
Blocks: 1148778
  Show dependency tree / graph
 
Reported: 2014-10-02 06:31 EDT by Martin Prpič
Modified: 2015-07-31 03:27 EDT (History)
31 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A denial of service flaw was found in the way the Linux kernel's XFS file system implementation ordered directory hashes under certain conditions. A local attacker could use this flaw to corrupt the file system by creating directories with colliding hash values, potentially resulting in a system crash.
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Clone Of:
Environment:
Last Closed: 2014-12-02 12:10:47 EST
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Regression: ---
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Documentation: ---
CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:1943 normal SHIPPED_LIVE Moderate: kernel-rt security, bug fix, and enhancement update 2014-12-02 17:09:02 EST

  None (edit)
Description Martin Prpič 2014-10-02 06:31:17 EDT 
A flaw was found in the way the xfs_da3_fixhashpath() function of the Linux kernel's XFS file system implementation ordered directory hashes under certain conditions. A local attacker could use this flaw to corrupt the file system by creating directories, potentially resulting in kernel panic.

Upstream fix:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c88547a8119e3b581318ab65e9b72f27f23e641d

Reproducer:

http://oss.sgi.com/cgi-bin/gitweb.cgi?p=xfs/cmds/xfstests.git;a=blob;f=src/dirhash_collide.c;h=55cec872d5061ac2ca0f56d1f11e6bf349d5bb97;hb=947ee8bd4b59770534297572b14c695e9c6e001e

References:

http://seclists.org/oss-sec/2014/q4/28
http://marc.info/?l=linux-xfs&m=139590613002926&w=2
Comment 2 Petr Matousek 2014-10-02 06:54:52 EDT 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and 7.
Comment 4 errata-xmlrpc 2014-12-02 12:09:21 EST 
This issue has been addressed in the following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:1943 https://rhn.redhat.com/errata/RHSA-2014-1943.html
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