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CVE-2012-2100

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2012-1580-01
Posted Dec 19, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1580-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the RHSA-2012:0862 update did not correctly fix the CVE-2011-4131 issue. A malicious Network File System version 4 server could return a crafted reply to a GETACL request, causing a denial of service on the client. A divide-by-zero flaw was found in the TCP Illinois congestion control algorithm implementation in the Linux kernel. If the TCP Illinois congestion control algorithm were in use, a local, unprivileged user could trigger this flaw and cause a denial of service.

tags | advisory, denial of service, kernel, local, tcp
systems | linux, redhat
advisories | CVE-2012-2100, CVE-2012-2375, CVE-2012-4444, CVE-2012-4565, CVE-2012-5517
MD5 | 1e660288ebddb211c27cc4445a21aa3a
Red Hat Security Advisory 2012-1445-01
Posted Nov 13, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-1445-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the RHSA-2010:0178 update did not correctly fix the CVE-2009-4307 issue, a divide-by-zero flaw in the ext4 file system code. A local, unprivileged user with the ability to mount an ext4 file system could use this flaw to cause a denial of service. This update also fixes several bugs.

tags | advisory, denial of service, kernel, local
systems | linux, redhat
advisories | CVE-2012-2100
MD5 | 480e24b74613787fc679a66aad52504c
Ubuntu Security Notice USN-1458-1
Posted Jun 1, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1458-1 - A flaw was found in the Linux's kernels ext4 file system when mounted with a journal. A local, unprivileged user could exploit this flaw to cause a denial of service. A flaw was discovered in the Linux kernel's cifs file system. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. H. Peter Anvin reported a flaw in the Linux kernel that could crash the system. A local user could exploit this flaw to crash the system. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4086, CVE-2012-1090, CVE-2012-1097, CVE-2012-1146, CVE-2012-2100, CVE-2011-4086, CVE-2012-1090, CVE-2012-1097, CVE-2012-1146, CVE-2012-2100
MD5 | 74cdba67d96a118e8e273afd297f397c
Ubuntu Security Notice USN-1440-1
Posted May 9, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1440-1 - A flaw was found in the Linux's kernels ext4 file system when mounted with a journal. A local, unprivileged user could exploit this flaw to cause a denial of service. Sasha Levin discovered a flaw in the permission checking for device assignments requested via the kvm ioctl in the Linux kernel. A local user could use this flaw to crash the system causing a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4086, CVE-2011-4347, CVE-2012-0045, CVE-2012-1090, CVE-2012-1097, CVE-2012-1146, CVE-2012-2100, CVE-2011-4086, CVE-2011-4347, CVE-2012-0045, CVE-2012-1090, CVE-2012-1097, CVE-2012-1146, CVE-2012-2100
MD5 | 139f6e879aa5fc266d424ada067dcb0e
Ubuntu Security Notice USN-1432-1
Posted May 9, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1432-1 - A flaw was found in the Linux's kernels ext4 file system when mounted with a journal. A local, unprivileged user could exploit this flaw to cause a denial of service. A flaw was discovered in the Linux kernel's cifs file system. An unprivileged local user could exploit this flaw to crash the system leading to a denial of service. A flaw was found in the Linux kernel's ext4 file system when mounting a corrupt filesystem. A user-assisted remote attacker could exploit this flaw to cause a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2011-4086, CVE-2012-1090, CVE-2012-2100, CVE-2011-4086, CVE-2012-1090, CVE-2012-2100
MD5 | 9a02f51053045741b612ac4b785e0d27
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