Shellshock, also known as Bashdoor, is a security bug in the widely used Unix Bash shell which was disclosed on 24 September 2014. Many Internet daemons, such as web servers, use Bash to process certain commands, allowing an attacker to cause vulnerable versions of Bash to execute arbitrary commands. This can allow an attacker to gain unauthorized access to a computer system.
Patch your slackware from this vulnerability now. Update your bash package with compatible package from http://www.slackware.com/security/viewer.php?l=slackware-security&y=2014&m=slackware-security.559646
Here are the details from the Slackware 14.1 ChangeLog: +--------------------------+ patches/packages/bash-4.2.050-i486-1_slack14.1.txz: Upgraded. Another bash update. Here's some information included with the patch: "This patch changes the encoding bash uses for exported functions to avoid clashes with shell variables and to avoid depending only on an environment variable's contents to determine whether or not to interpret it as a shell function." After this update, an environment variable will not go through the parser unless it follows this naming structure: BASH_FUNC_*%% Most scripts never expected to import functions from environment variables, so this change (although not backwards compatible) is not likely to break many existing scripts. It will, however, close off access to the parser as an attack surface in the vast majority of cases. There's already another vulnerability similar to CVE-2014-6271 for which there is not yet a fix, but this hardening patch prevents it (and likely many more similar ones). Thanks to Florian Weimer and Chet Ramey. (* Security fix *) +--------------------------+