Debian Security Advisory

DLA-316-1 eglibc -- LTS security update

Date Reported:
27 Sep 2015
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2014-8121.
More information:

Several vulnerabilities have been discovered in eglibc that may lead to a privilege escalation or denial of service.

  • Glibc pointer guarding weakness

    A weakness in the dynamic loader prior has been found. The issue is that the LD_POINTER_GUARD in the environment is not sanitized allowing local attackers easily to bypass the pointer guarding protection on set-user-ID and set-group-ID programs.

  • Potential application crash due to overread in fnmatch

    When processing certain malformed patterns, fnmatch can skip over the NUL byte terminating the pattern. This can potentially result in an application crash if fnmatch hits an unmapped page before encountering a NUL byte.

  • _IO_wstr_overflow integer overflow

    A miscalculation in _IO_wstr_overflow could potentially be exploited to overflow a buffer.

  • CVE-2014-8121

    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 while the database is iterated over the database, which triggers the file pointer to be reset.

For the oldoldstable distribution (squeeze), these problems have been fixed in version 2.11.3-4+deb6u7.

We recommend that you update your packages.