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Gentoo Linux Security Advisory GLSA 200506-08 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: GNU shtool, ocaml-mysql: Insecure temporary file creation |
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Date: June 11, 2005 |
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Bugs: #93782, #93784 |
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ID: 200506-08 |
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Synopsis |
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======== |
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|
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GNU shtool and ocaml-mysql are vulnerable to symlink attacks, |
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potentially allowing a local user to overwrite arbitrary files. |
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|
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Background |
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========== |
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|
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GNU shtool is a compilation of small shell scripts into a single shell |
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tool. The ocaml-mysql package includes the GNU shtool code. |
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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 dev-util/shtool < 2.0.1-r2 >= 2.0.1-r2 |
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2 dev-ml/ocaml-mysql < 1.0.3-r1 >= 1.0.3-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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Eric Romang has discovered that GNU shtool insecurely creates temporary |
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files with predictable filenames (CAN-2005-1751). On closer inspection, |
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Gentoo Security discovered that the shtool temporary file, once |
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created, was being reused insecurely (CAN-2005-1759). |
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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 create symbolic links in the temporary files |
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directory, pointing to a valid file somewhere on the filesystem. When a |
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GNU shtool script is executed, this would result in the file being |
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overwritten with the rights of the user running the script, which could |
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be the root user. |
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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. |
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Resolution |
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========== |
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All GNU shtool users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-util/shtool-2.0.1-r2" |
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|
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All ocaml-mysql users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-ml/ocaml-mysql-1.0.3-r1" |
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|
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References |
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========== |
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|
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[ 1 ] CAN-2005-1751 |
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http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1751 |
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[ 2 ] CAN-2005-1759 |
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http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1759 |
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|
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Availability |
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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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http://security.gentoo.org/glsa/glsa-200506-08.xml |
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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 2005 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/2.0 |
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