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CVE-2011-3638

Status Candidate

Overview

fs/ext4/extents.c in the Linux kernel before 3.0 does not mark a modified extent as dirty in certain cases of extent splitting, which allows local users to cause a denial of service (system crash) via vectors involving ext4 umount and mount operations.

Related Files

Red Hat Security Advisory 2012-0517-01
Posted Apr 25, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0517-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: A flaw was found in the Linux kernel in the way splitting two extents in ext4_ext_convert_to_initialized() worked. A local, unprivileged user with the ability to mount and unmount ext4 file systems could use this flaw to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, redhat
advisories | CVE-2011-3638
MD5 | 2f66b6402eb8dda49055cbfe48f61426
Red Hat Security Advisory 2012-0116-01
Posted Feb 15, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0116-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. The proc file system could allow a local, unprivileged user to obtain sensitive information or possibly cause integrity issues. Non-member VLAN packet handling for interfaces in promiscuous mode and also using the be2net driver could allow an attacker on the local network to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, redhat
advisories | CVE-2011-1020, CVE-2011-3347, CVE-2011-3637, CVE-2011-3638, CVE-2011-4110
MD5 | 80bccdf5c509aae88bc9da2ceeac24cb
Red Hat Security Advisory 2012-0107-01
Posted Feb 10, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0107-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Using the SG_IO ioctl to issue SCSI requests to partitions or LVM volumes resulted in the requests being passed to the underlying block device. If a privileged user only had access to a single partition or LVM volume, they could use this flaw to bypass those restrictions and gain read and write access to the entire block device. Refer to Red Hat Knowledgebase article DOC-67874, linked to in the References, for further details about this issue.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2011-3638, CVE-2011-4086, CVE-2011-4127, CVE-2012-0028, CVE-2012-0207
MD5 | ef90d65b50c4f7cbb80e1c1de46ae42e
Ubuntu Security Notice USN-1294-1
Posted Dec 8, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1294-1 - Peter Huewe discovered an information leak in the handling of reading security-related TPM data. A local, unprivileged user could read the results of a previous TPM command. Vasiliy Kulikov discovered that taskstats did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy. Qianfeng Zhang discovered that the bridge networking interface incorrectly handled certain network packets. A remote attacker could exploit this to crash the system, leading to a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, local
systems | linux, ubuntu
advisories | CVE-2011-1162, CVE-2011-2494, CVE-2011-2942, CVE-2011-3209, CVE-2011-3638, CVE-2011-4081, CVE-2011-4087, CVE-2011-4326
MD5 | 4140a017e41c8e07afe8d2c3038b67a3
Red Hat Security Advisory 2011-1530-03
Posted Dec 6, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1530-03 - The kernel packages contain the Linux kernel, the core of any Linux operating system. The proc file system could allow a local, unprivileged user to obtain sensitive information or possibly cause integrity issues. Non-member VLAN packet handling for interfaces in promiscuous mode and also using the be2net driver could allow an attacker on the local network to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, redhat
advisories | CVE-2011-1020, CVE-2011-3347, CVE-2011-3638, CVE-2011-4110
MD5 | dfc3ef314e2580c0027a786e0bf031cb
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