67 lines
2.1 KiB
XML
67 lines
2.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200504-06">
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<title>sharutils: Insecure temporary file creation</title>
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<synopsis>
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The unshar utility is vulnerable to symlink attacks, potentially allowing a
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local user to overwrite arbitrary files.
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</synopsis>
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<product type="ebuild">sharutils</product>
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<announced>April 06, 2005</announced>
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<revised>April 06, 2005: 01</revised>
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<bug>87939</bug>
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<access>local</access>
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<affected>
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<package name="app-arch/sharutils" auto="yes" arch="*">
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<unaffected range="ge">4.2.1-r11</unaffected>
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<vulnerable range="lt">4.2.1-r11</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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sharutils is a collection of tools to deal with shar archives.
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</p>
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</background>
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<description>
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<p>
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Joey Hess has discovered that the program unshar, which is a part
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of sharutils, creates temporary files in a world-writable directory
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with predictable names.
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</p>
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</description>
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<impact type="normal">
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<p>
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A local attacker could create symbolic links in the temporary
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files directory, pointing to a valid file somewhere on the filesystem.
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When unshar is executed, this would result in the file being
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overwritten with the rights of the user running the utility, which
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could be the root user.
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</p>
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</impact>
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<workaround>
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<p>
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There is no known workaround at this time.
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</p>
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</workaround>
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<resolution>
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<p>
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All sharutils users should upgrade to the latest version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=app-arch/sharutils-4.2.1-r11"</code>
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</resolution>
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<references>
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<uri link="http://www.ubuntulinux.org/support/documentation/usn/usn-104-1">Ubuntu Advisory</uri>
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</references>
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<metadata tag="requester" timestamp="Tue, 5 Apr 2005 07:42:03 +0000">
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koon
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</metadata>
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<metadata tag="submitter" timestamp="Tue, 5 Apr 2005 13:07:06 +0000">
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lewk
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</metadata>
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<metadata tag="bugReady" timestamp="Wed, 6 Apr 2005 20:15:09 +0000">
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lewk
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</metadata>
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</glsa>
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