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Gentoo Linux Security Advisory GLSA 200406-18 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: gzip: Insecure creation of temporary files |
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Date: June 24, 2004 |
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Bugs: #54890 |
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ID: 200406-18 |
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Synopsis |
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======== |
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|
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gzip contain a bug potentially allowing an attacker to execute |
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arbitrary commands. |
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Background |
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========== |
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|
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gzip (GNU zip) is popular compression program. The included gzexe |
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utility allows you to compress executables in place and have them |
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automatically uncompress and execute when you run them. |
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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-arch/gzip <= 1.3.3-r3 >= 1.3.3-r4 |
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|
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Description |
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=========== |
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|
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The script gzexe included with gzip contains a bug in the code that |
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handles tempfile creation. If the creation of a temp file fails when |
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using gzexe fails instead of bailing out it executes the command given |
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as argument. |
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|
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Impact |
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====== |
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|
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This could lead to priviege escalation by running commands under the |
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rights of the user running the self extracting file. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. All users are encouraged to |
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upgrade to the latest available version. |
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Resolution |
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========== |
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All gzip users should upgrade to the latest stable version: |
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# emerge sync |
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# emerge -pv ">=app-arch/gzip-1.3.3-r4" |
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# emerge ">=app-arch/gzip-1.3.3-r4" |
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|
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Additionally, once the upgrade is complete, all self extracting files |
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created with earlier versions gzexe should be recreated, since the |
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vulnerability is actually embedded in those executables. |
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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-200406-18.xml |
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|
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Concerns? |
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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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Copyright 2004 Gentoo Technologies, 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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