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Test ID:1.3.6.1.4.1.25623.1.0.70650
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2011:1851
Summary:Redhat Security Advisory RHSA-2011:1851
Description:The remote host is missing updates announced in
advisory RHSA-2011:1851.

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other using symmetric encryption and a
trusted third- party, the Key Distribution Center (KDC).

A buffer overflow flaw was found in the MIT krb5 telnet daemon
(telnetd). A remote attacker who can access the telnet port of a
target machine could use this flaw to execute arbitrary code as
root. (CVE-2011-4862)

Note that the krb5 telnet daemon is not enabled by default in any
version of Red Hat Enterprise Linux. In addition, the default firewall
rules block remote access to the telnet port. This flaw does not
affect the telnet daemon distributed in the telnet-server package.

For users who have installed the krb5-workstation package, have
enabled the telnet daemon, and have it accessible remotely, this
update should be applied immediately.

All krb5-workstation users should upgrade to these updated packages,
which contain a backported patch to correct this issue.

Solution:
Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

http://rhn.redhat.com/errata/RHSA-2011-1851.html
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-008.txt

Risk factor : High
Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-4862
Bugtraq: 20111226 MITKRB5-SA-2011-008 buffer overflow in telnetd [CVE-2011-4862] (Google Search)
http://archives.neohapsis.com/archives/bugtraq/2011-12/0172.html
http://www.exploit-db.com/exploits/18280/
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006117.html
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006118.html
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006119.html
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006120.html
Debian Security Information: DSA-2372 (Google Search)
http://www.debian.org/security/2011/dsa-2372
Debian Security Information: DSA-2373 (Google Search)
http://www.debian.org/security/2011/dsa-2373
Debian Security Information: DSA-2375 (Google Search)
http://www.debian.org/security/2011/dsa-2375
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071627.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071640.html
FreeBSD Security Advisory: FreeBSD-SA-11:08
http://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc
http://www.mandriva.com/security/advisories?name=MDVSA-2011:195
http://www.redhat.com/support/errata/RHSA-2011-1851.html
http://www.redhat.com/support/errata/RHSA-2011-1852.html
http://www.redhat.com/support/errata/RHSA-2011-1854.html
http://www.redhat.com/support/errata/RHSA-2011-1853.html
SuSE Security Announcement: SUSE-SU-2012:0010 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html
SuSE Security Announcement: SUSE-SU-2012:0018 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html
SuSE Security Announcement: SUSE-SU-2012:0042 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html
SuSE Security Announcement: SUSE-SU-2012:0050 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html
SuSE Security Announcement: openSUSE-SU-2012:0019 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html
SuSE Security Announcement: openSUSE-SU-2012:0051 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html
SuSE Security Announcement: SUSE-SU-2012:0024 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00007.html
SuSE Security Announcement: SUSE-SU-2012:0056 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00015.html
http://osvdb.org/78020
http://www.securitytracker.com/id?1026460
http://www.securitytracker.com/id?1026463
http://secunia.com/advisories/47341
http://secunia.com/advisories/47348
http://secunia.com/advisories/47357
http://secunia.com/advisories/47359
http://secunia.com/advisories/47373
http://secunia.com/advisories/47374
http://secunia.com/advisories/47397
http://secunia.com/advisories/47399
http://secunia.com/advisories/47441
http://secunia.com/advisories/46239
XForce ISS Database: multiple-telnetd-bo(71970)
http://xforce.iss.net/xforce/xfdb/71970
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