Bug 844107 (CVE-2013-2140) - VUL-0: CVE-2013-2140: kernel/xen: denial of service in xen-blkback
Summary: VUL-0: CVE-2013-2140: kernel/xen: denial of service in xen-blkback
Status: RESOLVED FIXED
Alias: CVE-2013-2140
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P5 - None : Normal
Target Milestone: ---
Assignee: Jan Beulich
QA Contact: Security Team bot
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Reported: 2013-10-04 15:36 UTC by Marcus Meissner
Modified: 2013-10-04 16:10 UTC (History)
2 users (show)

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Found By: Security Response Team
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Blocker: ---
Marketing QA Status: ---
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Description Marcus Meissner 2013-10-04 15:36:32 UTC 
via cve db

CVE-2013-2140

The dispatch_discard_io function in drivers/block/xen-blkback/blkback.c in the
Xen blkback implementation in the Linux kernel before 3.10.5 allows guest OS
users to cause a denial of service (data loss) via filesystem write operations
on a read-only disk that supports the (1) BLKIF_OP_DISCARD (aka discard or TRIM)
or (2) SCSI UNMAP feature.


References:
http://people.canonical.com/~ubuntu-security/cve/2013/CVE-2013-2140.html
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.10.5
http://www.openwall.com/lists/oss-security/2013/06/05/21
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=604c499cbbcc3d5fe5fb8d53306aa0fae1990109
https://github.com/torvalds/linux/commit/604c499cbbcc3d5fe5fb8d53306aa0fae1990109
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-2140
https://bugzilla.redhat.com/show_bug.cgi?id=971146

(not sure which versions this affects, please do tell)
Comment 1 Jan Beulich 2013-10-04 16:10:17 UTC 
We don't use or build that driver, and the variant we build and use has - afaik - never been entertaining this vulnerability (or if it did, it got fixed long ago).