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CVE-2012-2100
CVE information
Published
Last Modified
CVSSv2.0 Severity
Impact Analysis
Description
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..
CVSSv2.0 Score
- Severity
- High
- Base Score
- 7.1/10
- Exploit Score
- 8.6/10
- Access Vector
- Network
- Access Complexity
- Medium
- Authentication Required
- None
- Impact Score
- 6.9/10
- Confidentiality Impact
- None
- Availability Impact
- Complete
- Integrity Impact
- None
Products Affected
| CPE | Affected | Vulnerable | Excluding | Edit |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:x86:* |
Yes
|
- | - | |
| cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:x86:* |
Yes
|
- | - |
References
- http://www.openwall.com/lists/oss-security/2012/04/12/11
- https://bugzilla.redhat.com/show_bug.cgi?id=809687
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
- https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
- http://www.securityfocus.com/bid/53414
- http://rhn.redhat.com/errata/RHSA-2012-1445.html
- http://rhn.redhat.com/errata/RHSA-2012-1580.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d50f2ab6