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Gentoo Linux Security Advisory GLSA 200710-09 |
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http://security.gentoo.org/ |
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|
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Severity: Normal |
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Title: NX 2.1: User-assisted execution of arbitrary code |
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Date: October 09, 2007 |
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Bugs: #192712 |
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ID: 200710-09 |
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Synopsis |
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======== |
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|
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NX in the 2.1 series uses XFree86 4.3 code which is prone to an integer |
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overflow vulnerability. |
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|
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Background |
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========== |
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|
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NoMachine's NX establishes remote connections to X11 desktops over |
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small bandwidth links. NX and NX Node are the compression core |
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libraries, whereas NX is used by FreeNX and NX Node by the binary-only |
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NX servers. |
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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/nx < 3.0.0 >= 3.0.0 |
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2 net-misc/nxnode < 3.0.0-r3 >= 3.0.0-r3 |
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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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Chris Evans reported an integer overflow within the FreeType PCF font |
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file parser (CVE-2006-1861). NX and NX Node are vulnerable to this due |
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to shipping XFree86 4.3.0, which includes the vulnerable FreeType code. |
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|
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Impact |
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====== |
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|
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A remote attacker could exploit these integer overflows by enticing a |
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user to load a specially crafted PCF font file which might lead to the |
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execution of arbitrary code with the privileges of the user on the |
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machine running the NX server. |
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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 NX 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/nx-3.0.0" |
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|
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All NX Node 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/nxnode-3.0.0-r3" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2006-1861 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1861 |
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[ 2 ] GLSA 200607-02 |
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http://www.gentoo.org/security/en/glsa/glsa-200607-02.xml |
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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-200710-09.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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