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Candidate: CVE-2009-0745
Description:
The ext4_group_add function in fs/ext4/resize.c in the Linux
kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does
not properly initialize the group descriptor during a resize
(aka resize2fs) operation, which might allow local users to
cause a denial of service (OOPS) by arranging for crafted
values to be present in available memory.
References:
http://bugzilla.kernel.org/show_bug.cgi?id=12433
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fdff73f094e7220602cc3f8959c7230517976412
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7
Ubuntu-Description:
Notes:
jmm> ext4 is marked as experimental and the vulnerability fairly
jmm> obscure, I don't think we should spend energy on this. Dann,
jmm> if you don't object I'll mark this as "unimportant" in the
jmm> security tracker
dannf> Yeah, certainly unimportant, but I'll apply anyway since it
dannf> applies trivially
Bugs:
upstream: released (2.6.28.7, 2.6.29-rc4)
linux-2.6: released (2.6.29-1)
2.6.18-etch-security: N/A "code not present"
2.6.24-etch-security: released (2.6.24-6~etchnhalf.8etch1) [bugfix/all/ext4-initialize-the-new-group-descriptor-when-resizing-the-filesystem.patch]
2.6.26-lenny-security: released (2.6.26-13lenny2) [bugfix/all/ext4-initialize-the-new-group-descriptor-when-resizing-the-filesystem.patch]
2.6.15-dapper-security:
2.6.22-gutsy-security:
2.6.24-hardy-security:
2.6.27-intrepid-security:
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