[Secure-testing-team] Bug#688008: monkey: CGI scripts executed without dropping RUID/RGID root

[John Lightsey]

Package: monkey
Version: 0.9.3-1
Severity: grave
Tags: security
Justification: user security hole

The Monkey webserver retains RUID/RGID root so that it can regain root as
needed to perform privileged operations. Unfortunately, monkey does not drop
RUID/RGID root before executing CGI scripts. This allows any user with write
access to a cgi-bin directory to gain local root. It would also allow a remote
attacker to do the same in combination with a CGI/PHP script that has any
remote code execution bug.



-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash