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Gentoo Linux Security Advisory GLSA 200710-11 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: X Font Server: Multiple Vulnerabilities |
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Date: October 12, 2007 |
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Bugs: #185660, #194606 |
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ID: 200710-11 |
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Synopsis |
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======== |
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|
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Three vulnerabilities have been discovered in the X Font Server |
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possibly allowing local attackers to gain elevated privileges. |
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|
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Background |
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========== |
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|
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The X.Org X11 X Font Server provides a standard mechanism for an X |
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server to communicate with a font renderer. |
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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 x11-apps/xfs < 1.0.5 >= 1.0.5 |
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|
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Description |
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=========== |
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|
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iDefense reported that the xfs init script does not correctly handle a |
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race condition when setting permissions of a temporary file |
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(CVE-2007-3103). Sean Larsson discovered an integer overflow |
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vulnerability in the build_range() function possibly leading to a |
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heap-based buffer overflow when handling "QueryXBitmaps" and |
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"QueryXExtents" protocol requests (CVE-2007-4568). Sean Larsson also |
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discovered an error in the swap_char2b() function possibly leading to a |
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heap corruption when handling the same protocol requests |
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(CVE-2007-4990). |
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|
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Impact |
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====== |
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|
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The first issue would allow a local attacker to change permissions of |
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arbitrary files to be world-writable by performing a symlink attack. |
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The second and third issues would allow a local attacker to execute |
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arbitrary code with privileges of the user running the X Font Server, |
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usually xfs. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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|
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Resolution |
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========== |
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|
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All X Font Server 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 ">=x11-apps/xfs-1.0.5" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-3103 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3103 |
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[ 2 ] CVE-2007-4568 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4568 |
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[ 3 ] CVE-2007-4990 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4990 |
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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-200710-11.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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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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