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Bug 220973 (CVE-2007-5498) - sys-kernel/xen-sources-2.6.18 block backend dom0 crash (CVE-2007-5498)
Summary: sys-kernel/xen-sources-2.6.18 block backend dom0 crash (CVE-2007-5498)
Status: RESOLVED FIXED
Alias: CVE-2007-5498
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Security
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-05-08 18:13 UTC by Robert Buchholz (RETIRED)
Modified: 2013-09-15 18:52 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---

Attachments
linux-2.6-xen-check-num-of-segments-in-block-backend-driver.patch (linux-2.6-xen-check-num-of-segments-in-block-backend-driver.patch,2.36 KB, patch)
2008-05-08 19:34 UTC, Robert Buchholz (RETIRED) 		no flags Details | Diff
View All Add an attachment (proposed patch, testcase, etc.)

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Description Robert Buchholz (RETIRED) gentoo-dev 2008-05-08 18:13:55 UTC 
CVE-2007-5498 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-5498):
  The Xen hypervisor block backend driver for Linux kernel 2.6.18, when running
  on a 64-bit host with a 32-bit paravirtualized guest, allows local privileged
  users in the guest OS to cause a denial of service (host OS crash) via a
  request that specifies a large number of blocks.
Comment 1 Robert Buchholz (RETIRED) gentoo-dev 2008-05-08 19:34:01 UTC 
Created attachment 152507 [details, diff]
linux-2.6-xen-check-num-of-segments-in-block-backend-driver.patch

Extracted from kernel-2.6.18-53.1.19.el5.src.rpm
Comment 2 Micheal Marineau (RETIRED) gentoo-dev 2008-05-08 19:40:20 UTC 
(In reply to comment #1)
> Created an attachment (id=152507) [edit]
> linux-2.6-xen-check-num-of-segments-in-block-backend-driver.patch
> 
> Extracted from kernel-2.6.18-53.1.19.el5.src.rpm
> 

Our 2.6.18 kernel is currently based on the upstream kernel for Xen 3.2.0 which should already have the above patch. It looks like our 2.6.20 and 2.6.21 kernels need the fix though.
Comment 3 DEMAINE Benoît-Pierre, aka DoubleHP 2010-02-27 23:46:11 UTC 
Please update to recent kernel and check if bug still hapens. Latest stable is 2.6.31. Otherwise, please close.