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Gentoo Linux Security Advisory GLSA 200711-16 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: CUPS: Memory corruption |
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Date: November 12, 2007 |
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Bugs: #196736 |
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ID: 200711-16 |
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Synopsis |
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======== |
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|
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CUPS contains a boundary checking error that might lead to the |
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execution of arbitrary code. |
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|
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Background |
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========== |
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|
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CUPS provides a portable printing layer for UNIX-based operating |
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systems. |
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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-print/cups < 1.2.12-r2 >= 1.2.12-r2 |
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|
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Description |
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=========== |
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|
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Alin Rad Pop (Secunia Research) discovered an off-by-one error in the |
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ippReadIO() function when handling Internet Printing Protocol (IPP) |
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tags that might allow to overwrite one byte on the stack. |
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|
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Impact |
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====== |
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|
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A local attacker could send a specially crafted IPP request containing |
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"textWithLanguage" or "nameWithLanguage" tags, leading to a Denial of |
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Service or the execution of arbitrary code with the privileges of the |
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"lp" user. If CUPS is configured to allow network printing, this |
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vulnerability might be remotely exploitable. |
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|
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Workaround |
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========== |
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|
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To avoid remote exploitation, network access to CUPS servers on port |
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631/udp should be restricted. In order to do this, update the "Listen" |
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setting in cupsd.conf to "Listen localhost:631" or add a rule to the |
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system's firewall. However, this will not avoid local users from |
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exploiting this vulnerability. |
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|
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Resolution |
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========== |
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|
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All CUPS users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-print/cups-1.2.12-r2" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-4351 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4351 |
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|
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Availability |
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============ |
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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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|
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http://security.gentoo.org/glsa/glsa-200711-16.xml |
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|
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Concerns? |
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========= |
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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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|
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Copyright 2007 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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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/2.5 |
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-- |
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