News
Vigil@nce - Exim: privilege escalation via perl_startup
May 2016 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
A local attacker can use Exim configured with perl_startup, in
order to escalate his privileges.
Impacted products: Debian, Exim, Fedora, openSUSE, openSUSE Leap,
Ubuntu.
Severity: 2/4.
Creation date: 03/03/2016.
DESCRIPTION OF THE VULNERABILITY
The Exim product uses the "perl_startup" configuration directive,
which can be used to run code in Perl language.
However, environment variables are not filtered. If Exim is
installed suid root, a local attacker can thus pass variable to
Perl, in order to gain root privileges.
A local attacker can therefore use Exim configured with
perl_startup, in order to escalate his privileges.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Exim-privilege-escalation-via-perl-startup-19083
