<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200409-09"> <title>MIT krb5: Multiple vulnerabilities</title> <synopsis> MIT krb5 contains several double-free vulnerabilities, potentially allowing the execution of arbitrary code, as well as a denial of service vulnerability. </synopsis> <product type="ebuild">mit-krb5</product> <announced>2004-09-06</announced> <revised count="01">2004-09-06</revised> <bug>62417</bug> <access>remote</access> <affected> <package name="app-crypt/mit-krb5" auto="yes" arch="*"> <unaffected range="ge">1.3.4</unaffected> <vulnerable range="lt">1.3.4</vulnerable> </package> </affected> <background> <p> MIT krb5 is the free implementation of the Kerberos network authentication protocol by the Massachusetts Institute of Technology. </p> </background> <description> <p> The implementation of the Key Distribution Center (KDC) and the MIT krb5 library contain double-free vulnerabilities, making client programs as well as application servers vulnerable. </p> <p> The ASN.1 decoder library is vulnerable to a denial of service attack, including the KDC. </p> </description> <impact type="high"> <p> The double-free vulnerabilities could allow an attacker to execute arbitrary code on a KDC host and hosts running krb524d or vulnerable services. In the case of a KDC host, this can lead to a compromise of the entire Kerberos realm. Furthermore, an attacker impersonating a legitimate KDC or application server can potentially execute arbitrary code on authenticating clients. </p> <p> An attacker can cause a denial of service for a KDC or application server and clients, the latter if impersonating a legitimate KDC or application server. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All mit-krb5 users should upgrade to the latest stable version: </p> <code> # emerge sync # emerge -pv ">=app-crypt/mit-krb5-1.3.4" # emerge ">=app-crypt/mit-krb5-1.3.4"</code> </resolution> <references> <uri link="http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-002-dblfree.txt">MIT krb5 Security Advisory 2004-002</uri> <uri link="http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-003-asn1.txt">MIT krb5 Security Advisory 2004-003</uri> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0642">CAN-2004-0642</uri> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0643">CAN-2004-0643</uri> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0644">CAN-2004-0644</uri> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0772">CAN-2004-0772</uri> </references> <metadata tag="requester" timestamp="2004-09-03T20:07:22Z"> jaervosz </metadata> <metadata tag="submitter" timestamp="2004-09-04T16:18:26Z"> vorlon078 </metadata> </glsa>