drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Pufferüberlauf in rsync
Name: |
Pufferüberlauf in rsync |
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ID: |
200804-16 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Do, 17. April 2008, 14:14 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1720 |
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Applikationen: |
rsync |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200804-16 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: High Title: rsync: Execution of arbitrary code Date: April 17, 2008 Bugs: #216887 ID: 200804-16
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Synopsis ========
A buffer overflow in rsync might lead to the remote execution of arbitrary code when extended attributes are being used.
Background ==========
rsync is a file transfer program to keep remote directories synchronized.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/rsync < 2.6.9-r6 >= 2.6.9-r6
Description ===========
Sebastian Krahmer of SUSE reported an integer overflow in the expand_item_list() function in the file util.c which might lead to a heap-based buffer overflow when extended attribute (xattr) support is enabled.
Impact ======
A remote attacker could send a file containing specially crafted extended attributes to an rsync deamon, or entice a user to sync from an rsync server containing specially crafted files, possibly leading to the execution of arbitrary code.
Please note that extended attributes are only enabled when USE="acl" is enabled, which is the default setting.
Workaround ==========
Disable extended attributes in the rsync daemon by setting "refuse options = xattrs" in the file "/etc/rsyncd.conf" (or append "xattrs" to an existing "refuse" statement). When synchronizing to a server, do not provide the "-X" parameter to rsync. You can also disable the "acl" USE flag for rsync and recompile the package.
Resolution ==========
All rsync users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/rsync-2.6.9-r6"
References ==========
[ 1 ] CVE-2008-1720 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1720
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200804-16.xml
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 security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2008 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.
http://creativecommons.org/licenses/by-sa/2.5
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