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CVE-2014-8121

Status Candidate

Overview

DB_LOOKUP in nss_files/files-XXX.c in the Name Service Switch (NSS) in GNU C Library (aka glibc or libc6) 2.21 and earlier does not properly check if a file is open, which allows remote attackers to cause a denial of service (infinite loop) by performing a look-up on a database while iterating over it, which triggers the file pointer to be reset.

Related Files

Ubuntu Security Notice USN-2985-2
Posted May 26, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2985-2 - USN-2985-1 fixed vulnerabilities in the GNU C Library. The fix for CVE-2014-9761 introduced a regression which affected applications that use the libm library but were not fully restarted after the upgrade. This update removes the fix for CVE-2014-9761 and a future update will be provided to address this issue. Various other issues were also addressed.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-8121, CVE-2014-9761, CVE-2015-1781, CVE-2015-5277, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778, CVE-2015-8779, CVE-2016-3075
MD5 | bc09346c98299cdd5f4ba8c06147a6da
Gentoo Linux Security Advisory 201602-02
Posted Feb 17, 2016
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201602-2 - Multiple vulnerabilities have been found in the GNU C library, the worst allowing for remote execution of arbitrary code. Versions less than 2.21-r2 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2013-7423, CVE-2014-0475, CVE-2014-5119, CVE-2014-6040, CVE-2014-7817, CVE-2014-8121, CVE-2014-9402, CVE-2015-1472, CVE-2015-1781, CVE-2015-7547, CVE-2015-8776, CVE-2015-8778, CVE-2015-8779
MD5 | 4ae3105bd8ed710ad3f2ffe994f6efdc
Debian Security Advisory 3480-1
Posted Feb 16, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3480-1 - Several vulnerabilities have been fixed in the GNU C Library, eglibc.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2014-8121, CVE-2015-1781, CVE-2015-7547, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778, CVE-2015-8779
MD5 | 83aa6b02df0a111f7a201c0d5e2cb54e
Ubuntu Security Notice USN-2985-1
Posted May 26, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2985-1 - Martin Carpenter discovered that pt_chown in the GNU C Library did not properly check permissions for tty files. A local attacker could use this to gain administrative privileges or expose sensitive information. Robin Hack discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not properly manage its file descriptors. An attacker could use this to cause a denial of service (infinite loop). Various other issues were also addressed.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2013-2207, CVE-2014-8121, CVE-2014-9761, CVE-2015-1781, CVE-2015-5277, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778, CVE-2015-8779, CVE-2016-2856, CVE-2016-3075
MD5 | 3f2df4217b9adccdba110c883117f6d0
Red Hat Security Advisory 2015-0327-02
Posted Mar 5, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-0327-02 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the Name Server Caching Daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. An out-of-bounds read flaw was found in the way glibc's iconv() function converted certain encoded data to UTF-8. An attacker able to make an application call the iconv() function with a specially crafted argument could use this flaw to crash that application. It was found that the files back end of Name Service Switch did not isolate iteration over an entire database from key-based look-up API calls. An application performing look-ups on a database while iterating over it could enter an infinite loop, leading to a denial of service.

tags | advisory, denial of service
systems | linux, redhat, osx
advisories | CVE-2014-6040, CVE-2014-8121
MD5 | 7ced1ba2d35fa8df4c3547faac7cd08e
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