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+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="200712-14">
+ <title>CUPS: Multiple vulnerabilities</title>
+ <synopsis>
+ Multiple vulnerabilities have been discovered in CUPS, allowing for the
+ remote execution of arbitrary code and a Denial of Service.
+ </synopsis>
+ <product type="ebuild">cups</product>
+ <announced>2007-12-18</announced>
+ <revised count="01">2007-12-18</revised>
+ <bug>199195</bug>
+ <bug>201042</bug>
+ <bug>201570</bug>
+ <access>remote</access>
+ <affected>
+ <package name="net-print/cups" auto="yes" arch="*">
+ <unaffected range="rge">1.2.12-r4</unaffected>
+ <unaffected range="ge">1.3.5</unaffected>
+ <vulnerable range="lt">1.3.5</vulnerable>
+ </package>
+ </affected>
+ <background>
+ <p>
+ CUPS provides a portable printing layer for UNIX-based operating
+ systems. The alternate pdftops filter is a CUPS filter used to convert
+ PDF files to the Postscript format via Poppler; the filter is installed
+ by default in Gentoo Linux.
+ </p>
+ </background>
+ <description>
+ <p>
+ Wei Wang (McAfee AVERT Research) discovered an integer underflow in the
+ asn1_get_string() function of the SNMP backend, leading to a
+ stack-based buffer overflow when handling SNMP responses
+ (CVE-2007-5849). Elias Pipping (Gentoo) discovered that the alternate
+ pdftops filter creates temporary files with predictable file names when
+ reading from standard input (CVE-2007-6358). Furthermore, the
+ resolution of a Denial of Service vulnerability covered in GLSA
+ 200703-28 introduced another Denial of Service vulnerability within SSL
+ handling (CVE-2007-4045).
+ </p>
+ </description>
+ <impact type="high">
+ <p>
+ A remote attacker on the local network could exploit the first
+ vulnerability to execute arbitrary code with elevated privileges by
+ sending specially crafted SNMP messages as a response to an SNMP
+ broadcast request. A local attacker could exploit the second
+ vulnerability to overwrite arbitrary files with the privileges of the
+ user running the CUPS spooler (usually lp) by using symlink attacks. A
+ remote attacker could cause a Denial of Service condition via the third
+ vulnerability when SSL is enabled in CUPS.
+ </p>
+ </impact>
+ <workaround>
+ <p>
+ To disable SNMP support in CUPS, you have have to manually delete the
+ file "/usr/libexec/cups/backend/snmp". Please note that the file is
+ reinstalled if you merge CUPS again later. To disable the pdftops
+ filter, delete all lines referencing "pdftops" in CUPS' "mime.convs"
+ configuration file. To work around the third vulnerability, disable SSL
+ support via the corresponding USE flag.
+ </p>
+ </workaround>
+ <resolution>
+ <p>
+ All CUPS users should upgrade to the latest version:
+ </p>
+ <code>
+ # emerge --sync
+ # emerge --ask --oneshot --verbose "&gt;=net-print/cups-1.2.12-r4"</code>
+ </resolution>
+ <references>
+ <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4045">CVE-2007-4045</uri>
+ <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5849">CVE-2007-5849</uri>
+ <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6358">CVE-2007-6358</uri>
+ <uri link="https://www.gentoo.org/security/en/glsa/glsa-200703-28.xml">GLSA 200703-28</uri>
+ </references>
+ <metadata tag="requester" timestamp="2007-12-14T15:44:48Z">
+ p-y
+ </metadata>
+ <metadata tag="bugReady" timestamp="2007-12-14T15:45:00Z">
+ p-y
+ </metadata>
+ <metadata tag="submitter" timestamp="2007-12-15T13:31:00Z">
+ rbu
+ </metadata>
+</glsa>