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