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80 lines
2.9 KiB
80 lines
2.9 KiB
<?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="200501-02">
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<title>a2ps: Multiple vulnerabilities</title>
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<synopsis>
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The fixps and psmandup scripts in the a2ps package are vulnerable to
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symlink attacks, potentially allowing a local user to overwrite arbitrary
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files. A vulnerability in a2ps filename handling could also result in
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arbitrary command execution.
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</synopsis>
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<product type="ebuild">a2ps</product>
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<announced>January 04, 2005</announced>
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<revised>May 22, 2006: 03</revised>
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<bug>75784</bug>
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<bug>61500</bug>
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<access>local and remote</access>
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<affected>
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<package name="app-text/a2ps" auto="yes" arch="*">
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<unaffected range="ge">4.13c-r2</unaffected>
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<vulnerable range="lt">4.13c-r2</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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a2ps is an Any to Postscript filter that can convert to Postscript from
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many filetypes. fixps is a script that fixes errors in Postscript
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files. psmandup produces a Postscript file for printing in manual
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duplex mode.
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</p>
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</background>
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<description>
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<p>
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Javier Fernandez-Sanguino Pena discovered that the a2ps package
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contains two scripts that create insecure temporary files (fixps and
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psmandup). Furthermore, we fixed in a previous revision a vulnerability
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in a2ps filename handling (CAN-2004-1170).
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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 files
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directory, pointing to a valid file somewhere on the filesystem. When
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fixps or psmandup is executed, this would result in the file being
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overwritten with the rights of the user running the utility. By
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enticing a user or script to run a2ps on a malicious filename, an
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attacker could execute arbitrary commands on the system with the rights
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of that user or script.
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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 a2ps 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-text/a2ps-4.13c-r2"</code>
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</resolution>
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<references>
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<uri link="http://secunia.com/advisories/13641/">Secunia SA13641</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1170">CAN-2004-1170</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1377">CVE-2004-1377</uri>
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<uri link="http://lists.netsys.com/pipermail/full-disclosure/2004-August/025678.html">Full-Disclosure Advisory</uri>
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</references>
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<metadata tag="requester" timestamp="Tue, 4 Jan 2005 09:44:14 +0000">
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koon
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</metadata>
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<metadata tag="bugReady" timestamp="Tue, 4 Jan 2005 09:44:22 +0000">
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koon
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</metadata>
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<metadata tag="submitter" timestamp="Tue, 4 Jan 2005 11:06:21 +0000">
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SeJo
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</metadata>
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</glsa>
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