There is a new bash vulnerability for which there are no technical details so I presume it is scarier than the one mentioned few days ago. Fortunately there is already a patch.
IBM linux toolbox released bash 4.2.3.
Download link for AIX 6.1 and above: ftp://ftp.software.ibm.com/aix/freeSoftware/aixtoolbox/RPMS/ppc/bash/bash-4.2-3.aix6.1.ppc.rpm
Optional documentation download: ftp://ftp.software.ibm.com/aix/freeSoftware/aixtoolbox/RPMS/ppc/bash/bash-doc-4.2-2.aix6.1.ppc.rpm
Perzl.org bash 4.3.9: http://www.perzl.org/aix/index.php?n=Main.Bash
More details on redhat website: https://access.redhat.com/security/cve/CVE-2014-6278