It was found that the fix for CVE-2014-6271 was incomplete, and
Bash still allowed certain characters to be injected into other
environments via specially crafted environment variables. An
attacker could potentially use this flaw to override or bypass
environment restrictions to execute shell commands. Certain
services and applications allow remote unauthenticated attackers to
provide environment variables, allowing them to exploit this issue
(CVE-2014-7169, CVE-2014-7186, CVE-2014-7187).

Additionally bash has been updated from patch level 37 to 48 using
the upstream patches at ftp://ftp.gnu.org/gnu/bash/bash-4.2-patches/
which resolves various bugs.