getmail: Filesystem overwrite vulnerability
Gentoo Linux Security Advisory
||GLSA 200409-32 / getmail
||September 23, 2004
||May 22, 2006: 02
All supported architectures
getmail contains a vulnerability that could potentially allow any local
user to create or overwrite files in any directory on the system. This flaw
can be escalated further and possibly lead to a complete system compromise.
getmail is a reliable fetchmail replacement that supports Maildir,
Mboxrd and external MDA delivery.
David Watson discovered a vulnerability in getmail when it is
configured to run as root and deliver mail to the maildirs/mbox files
of untrusted local users. A malicious local user can then exploit a
race condition, or a similar symlink attack, and potentially cause
getmail to create or overwrite files in any directory on the system.
An untrusted local user could potentially create or overwrite files in
any directory on the system. This vulnerability may also be exploited
to have arbitrary commands executed as root.
Do not run getmail as a privileged user; or, in version 4, use an
external MDA with explicitly configured user and group privileges.
All getmail users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge sync
# emerge -pv ">=net-mail/getmail-4.2.0"
# emerge ">=net-mail/getmail-4.2.0"