Several vulnerabilities have been fixed in eglibc, Debian's version of the GNU C library:
CVE-2015-0235
Qualys discovered that the gethostbyname and gethostbyname2
functions were subject to a buffer overflow if provided with a
crafted IP address argument. This could be used by an attacker to
execute arbitrary code in processes which called the affected
functions.
The original glibc bug was reported by Peter Klotz.
CVE-2014-7817
Tim Waugh of Red Hat discovered that the WRDE_NOCMD option of the
wordexp function did not suppress command execution in all cases.
This allows a context-dependent attacker to execute shell
commands.
CVE-2012-6656 CVE-2014-6040
The charset conversion code for certain IBM multi-byte code pages
could perform an out-of-bounds array access, causing the process
to crash. In some scenarios, this allows a remote attacker to
cause a persistent denial of service.
2.13-38+deb7u7