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Gentoo: GLSA-200407-10 Normal: Rsync Directory Traversal Threat

Under specific conditions, the rsync daemon is vulnerable to a directory traversal allowing to write files outside a sync module.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200407-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: rsync: Directory traversal in rsync daemon Date: July 12, 2004 Bugs: #49534 ID: 200407-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= Under specific conditions, the rsync daemon is vulnerable to a directory traversal allowing to write files outside a sync module. Background ========= rsync is a utility that provides fast incremental file transfers. It is used to efficiently synchronize files between hosts and is used by emerge to fetch Gentoo's Portage tree. rsyncd is the rsync daemon, which listens to connections from rsync clients. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/rsync = 2.6.0-r2 Description ========== 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. Impact ===== On affected configurations and if the rsync daemon runs under a privileged user, a remote client can exploit this vulnerability to completelycompromise the host. Workaround ========= 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". Resolution ========= 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" References ========= [ 1 ] CAN-2004-0426 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200407-10 Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org/. License ====== Copyright 2004 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/1.0/ . Gentoo's notice on the critical flaw in rsync that permits directory traversal, outlining the severe risks of system exploitation.. Rsync Directory Traversal,Gentoo Advisory,System Security,File Transfer Risks. . LinuxSecurity.com Team

Jul 12, 2004 Gentoo