The remote Debian host is missing a security-related update.
Tavis Ormandy discovered that the patch applied to fix CVE-2014-6271 released in DSA-3032-1 for bash, the GNU Bourne-Again Shell, was incomplete and could still allow some characters to be injected into another environment (CVE-2014-7169 ). With this update prefix and suffix for environment variable names which contain shell functions are added as hardening measure. Additionally two out-of-bounds array accesses in the bash parser are fixed which were revealed in Red Hat's internal analysis for these issues and also independently reported by Todd Sabin.
Upgrade the bash packages. For the stable distribution (wheezy), these problems have been fixed in version 4.2+dfsg-0.1+deb7u3.