The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- http://rhn.redhat.com/errata/RHSA-2012-1580.html
- https://bugzilla.redhat.com/show_bug.cgi?id=809687
- http://rhn.redhat.com/errata/RHSA-2012-1445.html
- http://www.securityfocus.com/bid/53414
- http://www.openwall.com/lists/oss-security/2012/04/12/11
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
- https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
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CVSS Vectors
Weaknesses (CWE)
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MITRE ATT&CK TTPs
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