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Gentoo Linux Security Advisory GLSA 200407-10 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: rsync: Directory traversal in rsync daemon |
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Date: July 12, 2004 |
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Bugs: #49534 |
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ID: 200407-10 |
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Synopsis |
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======== |
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|
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Under specific conditions, the rsync daemon is vulnerable to a |
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directory traversal allowing to write files outside a sync module. |
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|
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Background |
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========== |
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|
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rsync is a utility that provides fast incremental file transfers. It is |
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used to efficiently synchronize files between hosts and is used by |
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emerge to fetch Gentoo's Portage tree. rsyncd is the rsync daemon, |
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which listens to connections from rsync clients. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/rsync <= 2.6.0-r1 >= 2.6.0-r2 |
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|
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Description |
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=========== |
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|
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When rsyncd is used without chroot ("use chroot = false" in the |
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rsyncd.conf file), the paths sent by the client are not checked |
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thoroughly enough. If rsyncd is used with read-write permissions ("read |
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only = false"), this vulnerability can be used to write files anywhere |
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with the rights of the rsyncd daemon. With default Gentoo |
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installations, rsyncd runs in a chroot, without write permissions and |
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with the rights of the "nobody" user. |
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|
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Impact |
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====== |
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|
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On affected configurations and if the rsync daemon runs under a |
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privileged user, a remote client can exploit this vulnerability to |
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completely compromise the host. |
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|
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Workaround |
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========== |
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|
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You should never set the rsync daemon to run with "use chroot = false". |
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If for some reason you have to run rsyncd without a chroot, then you |
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should not set "read only = false". |
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|
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Resolution |
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========== |
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All users should update to the latest version of the rsync package. |
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# emerge sync |
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# emerge -pv ">=net-misc/rsync-2.6.0-r2" |
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# emerge ">=net-misc/rsync-2.6.0-r2" |
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|
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References |
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========== |
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[ 1 ] CAN-2004-0426 |
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http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0426 |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200407-10.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2004 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/1.0 |
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