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CVE-2012-6547

Status Candidate

Overview

The __tun_chr_ioctl function in drivers/net/tun.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.

Related Files

Red Hat Security Advisory 2013-0744-01
Posted Apr 23, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0744-01 - Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way the Intel i915 driver in the Linux kernel handled the allocation of the buffer used for relocation copies. A local user with console access could use this flaw to cause a denial of service or escalate their privileges. A buffer overflow flaw was found in the way UTF-8 characters were converted to UTF-16 in the utf8s_to_utf16s() function of the Linux kernel's FAT file system implementation. A local user able to mount a FAT file system with the "utf8=1" option could use this flaw to crash the system or, potentially, to escalate their privileges.

tags | advisory, denial of service, overflow, kernel, local
systems | linux, redhat
advisories | CVE-2012-6537, CVE-2012-6546, CVE-2012-6547, CVE-2013-0349, CVE-2013-0913, CVE-2013-1767, CVE-2013-1773, CVE-2013-1774, CVE-2013-1792, CVE-2013-1796, CVE-2013-1797, CVE-2013-1798, CVE-2013-1826, CVE-2013-1827
SHA-256 | cbd907594e654e3d3d2b243dd52c44128cb2ec5866fbf646e4281d98046c891d
Red Hat Security Advisory 2013-0747-01
Posted Apr 16, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0747-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the Xen netback driver implementation in the Linux kernel. A privileged guest user with access to a para-virtualized network device could use this flaw to cause a long loop in netback, leading to a denial of service that could potentially affect the entire system.

tags | advisory, denial of service, kernel
systems | linux, redhat
advisories | CVE-2012-6537, CVE-2012-6542, CVE-2012-6546, CVE-2012-6547, CVE-2013-0216, CVE-2013-0231, CVE-2013-1826
SHA-256 | 9e0aa536e0da762edf8c498c10bb83405607592006ca6d9a7c71cb4b1a98321e
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