CVE-2012-2100 Details

CVE-2012-2100

Published: 2012-07-03
Last Modified: 2013-02-08
CVE Author: NIST National Vulnerability Database
CVE Assigner: cve@mitre.org
Summary

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.

Analysis
Common Vulnerability Score System v2.0
Severity High
Base Score 7.1/10
Exploit Score 8.6/10
Access Vector Network
Access Complexity Medium
Authentication None
Impact Score 6.9/10
Confidentiality Impact None
Availability Impact Complete
Integrity Impact None
Vector String AV:N/AC:M/Au:N/C:N/I:N/A:C
Common Vulnerability Score System v3.1

NIST has not assigned a CVSSv3.1 Score.

Products Reported
CPE Vulnerable Start Excluding
cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:x86:* Yes - -
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:x86:* Yes - -
References

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

CVE ID
CVE-2012-2100
Published
2012-07-03
Modified
2013-02-08
CVSSv2.0
High
PCI Compliance
Fail
US-CERT Alert
No
CWE
CWE-189

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