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Gentoo Linux Security Advisory GLSA 200407-11 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: wv: Buffer overflow vulnerability |
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Date: July 14, 2004 |
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Bugs: #56595 |
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ID: 200407-11 |
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Synopsis |
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======== |
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|
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A buffer overflow vulnerability exists in the wv library that can allow |
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an attacker to execute arbitrary code with the privileges of the user |
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running the vulnerable application. |
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|
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Background |
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========== |
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|
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The wv library allows access to MS Word files. It can parse Word files |
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and allow other applications, such as abiword, to import those files |
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into their native formats. |
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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 app-text/wv < 1.0.0-r1 >= 1.0.0-r1 |
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|
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Description |
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=========== |
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|
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A use of strcat without proper bounds checking leads to an exploitable |
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buffer overflow. The vulnerable code is executed when wv encounters an |
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unrecognized token, so a specially crafted file, loaded in wv, can |
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trigger the vulnerable code and execute it's own arbitrary code. This |
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exploit is only possible when the user loads the document into HTML |
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view mode. |
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|
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Impact |
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====== |
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|
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By inducing a user into running wv on a special file, an attacker can |
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execute arbitrary code with the permissions of the user running the |
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vulnerable program. |
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|
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Workaround |
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========== |
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|
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Users should not view untrusted documents with wvHtml or applications |
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using wv. When loading an untrusted document in an application using |
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the wv library, make sure HTML view is disabled. |
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|
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Resolution |
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========== |
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All users should upgrade to the latest available version. |
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# emerge sync |
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# emerge -pv ">=app-text/wv-1.0.0-r1" |
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# emerge ">=app-text/wv-1.0.0-r1" |
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|
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References |
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========== |
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|
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[ 1 ] iDEFENSE Security Advisory |
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|
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http://www.idefense.com/application/poi/display?id=115&type=vulnerabilities&flashstatus=true |
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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-200407-11.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 2004 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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http://creativecommons.org/licenses/by-sa/1.0 |
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