Vulnerability Assessment & Network Security Forums
If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
rsync: Directory traversal in rsync daemon
Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200407-10
(rsync: Directory traversal in rsync daemon)
When rsyncd is used without chroot ("use chroot = false" in the rsyncd.conf
file), the paths sent by the client are not checked thoroughly enough. If
rsyncd is used with read-write permissions ("read only = false"), this
vulnerability can be used to write files anywhere with the rights of the
rsyncd daemon. With default Gentoo installations, rsyncd runs in a chroot,
without write permissions and with the rights of the "nobody" user.
On affected configurations and if the rsync daemon runs under a privileged
user, a remote client can exploit this vulnerability to completely
compromise the host.
You should never set the rsync daemon to run with "use chroot = false". If
for some reason you have to run rsyncd without a chroot, then you should
not set "read only = false".
All users should update to the latest version of the rsync package.
# emerge sync
# emerge -pv ">=net-misc/rsync-2.6.0-r2"
# emerge ">=net-misc/rsync-2.6.0-r2"
Network Security Threat Level: Medium
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2005 Michel Arboi
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