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CVE
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CVE-2012-2100

Date: (C)2012-07-03   (M)2017-11-18 


The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 3.2.2, on the x86 platform and unspecified other platforms, allows user-assisted remote attackers to trigger inconsistent filesystem-groups data and possibly cause a denial of service via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value). NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4307.

CVSS Score: 7.1Access Vector: NETWORK
Exploit Score: 8.6Access Complexity: MEDIUM
Impact Score: 6.9Authentication: NONE
 Confidentiality: NONE
 Integrity: NONE
 Availability: COMPLETE





Reference:
BID-53414
RHSA-2012:1445
RHSA-2012:1580
http://www.openwall.com/lists/oss-security/2012/04/12/11
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
https://bugzilla.redhat.com/show_bug.cgi?id=809687
https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b

CPE    2
cpe:/o:linux:linux_kernel:3.2.1::~~~~x86~
cpe:/o:linux:linux_kernel:3.2::~~~~x86~
CWE    1
CWE-189
OVAL    10
oval:org.secpod.oval:def:1500111
oval:org.secpod.oval:def:1600296
oval:org.secpod.oval:def:202487
oval:org.secpod.oval:def:500921
...

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