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Gentoo Linux Security Advisory GLSA 200705-10 |
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http://security.gentoo.org/ |
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|
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Severity: High |
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Title: LibXfont, TightVNC: Multiple vulnerabilities |
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Date: May 08, 2007 |
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Bugs: #172575, #174200 |
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ID: 200705-10 |
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|
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Synopsis |
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======== |
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|
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Multiple vulnerabilities have been reported in libXfont and TightVNC, |
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allowing for the execution of arbitrary code with root privileges. |
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|
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Background |
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========== |
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|
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LibXfont is the X.Org font library. TightVNC is a VNC client/server for |
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X displays. |
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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/tightvnc < 1.2.9-r4 >= 1.2.9-r4 |
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2 x11-libs/libXfont < 1.2.7-r1 >= 1.2.7-r1 |
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------------------------------------------------------------------- |
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2 affected packages on all of their supported architectures. |
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------------------------------------------------------------------- |
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|
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Description |
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=========== |
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|
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The libXfont code is prone to several integer overflows, in functions |
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ProcXCMiscGetXIDList(), bdfReadCharacters() and FontFileInitTable(). |
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TightVNC contains a local copy of this code and is also affected. |
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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 use a specially crafted BDF Font to gain root |
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privileges on the vulnerable host. |
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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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All libXfont 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-libs/libXfont-1.2.7-r1" |
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|
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All TightVNC 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-misc/tightvnc-1.2.9-r4" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-1003 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1003 |
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[ 2 ] CVE-2007-1351 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1351 |
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[ 3 ] CVE-2007-1352 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1352 |
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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-200705-10.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 |