Title: AMaViS Arbitrary Command Execution Vulnerability
Severity: HIGH
Description:
AMaViS is a script-based email virus scanner that runs on Linux machines. The latest versions, (AMaViS 0.2.0Pre-4) allows for malicious users to insert arbitrary commands that AMaViS will unknowingly run as root in the subject header of messages with virus-infected attached files. The problem is in the scanmails script, detailed below:
cat <<EOF| ${mail} -s "VIRUS IN YOUR MAIL TO $7" $2
V I R U S A L E R T
Our viruschecker found a VIRUS in your email to "$7".
We stopped delivery of this email!
Now it is on you to check your system for viruses
For further information about this viruschecker see:
http://aachalon.de/AMaViS/
AMaViS - A Mail Virus Scanner, licenced GPL
EOF
$2 (which could be 'rm -rf /') will expand to a shell command, executed as root. The possible consequence of this being exploited is a remote root compromise.
Affected Products:
- AMaViS AMaViS 0.2.0pre-4
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