Attacker Value

Unknown

(0 users assessed)

Exploitability

Unknown

(0 users assessed)

User Interaction

Unknown

Privileges Required

Unknown

Attack Vector

Unknown

0

CVE-2011-4862

Disclosure Date: December 25, 2011 •

Metasploit Module

Telnet Service Encryption Key ID Overflow Detection

FreeBSD Telnet Service Encryption Key ID Buffer Overflow

Linux BSD-derived Telnet Service Encryption Key ID Buffer Overflow

Description

Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.2 and earlier, Heimdal 1.5.1 and earlier, GNU inetutils, and possibly other products allows remote attackers to execute arbitrary code via a long encryption key, as exploited in the wild in December 2011.

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CVSS V3 Severity and Metrics

Data provided by the National Vulnerability Database (NVD)

Base Score:

None

Impact Score:

Unknown

Exploitability Score:

Unknown

Vector:

Attack Vector (AV):

Unknown

Attack Complexity (AC):

Unknown

Privileges Required (PR):

Unknown

User Interaction (UI):

Unknown

Scope (S):

Unknown

Confidentiality (C):

Unknown

Integrity (I):

Unknown

Availability (A):

Unknown

Metasploit Modules

Telnet Service Encryption Key ID Overflow Detection (https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/telnet/telnet_encrypt_overflow.rb)

FreeBSD Telnet Service Encryption Key ID Buffer Overflow (https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/freebsd/telnet/telnet_encrypt_keyid.rb)

Linux BSD-derived Telnet Service Encryption Key ID Buffer Overflow (https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/telnet/telnet_encrypt_keyid.rb)

References

Canonical

CVE-2011-4862 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4862)

Advisory

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html

SECUNIA-47399 (http://secunia.com/advisories/47399)

DSA-2375 (http://www.debian.org/security/2011/dsa-2375)

http://www.redhat.com/support/errata/RHSA-2011-1854.html

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html

20111226 MITKRB5-SA-2011-008 buffer overflow in telnetd [CVE-2011-4862] (http://archives.neohapsis.com/archives/bugtraq/2011-12/0172.html)

DSA-2372 (http://www.debian.org/security/2011/dsa-2372)

SECUNIA-47359 (http://secunia.com/advisories/47359)

FEDORA-2011-17493 (http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071640.html)

[freebsd-security] 20111223 Merry Christmas from the FreeBSD Security Team (http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006120.html)

SECUNIA-47374 (http://secunia.com/advisories/47374)

[freebsd-security] 20111223 Merry Christmas from the FreeBSD Security Team (http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006118.html)

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html

FEDORA-2011-17492 (http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071627.html)

http://www.mandriva.com/security/advisories?name=MDVSA-2011:195

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00007.html

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html

OSVDB-78020 (http://osvdb.org/78020)

SECTRACK-1026463 (http://www.securitytracker.com/id?1026463)

[freebsd-security] 20111223 Merry Christmas from the FreeBSD Security Team (http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006117.html)

SECUNIA-47341 (http://secunia.com/advisories/47341)

http://www.redhat.com/support/errata/RHSA-2011-1852.html

http://www.redhat.com/support/errata/RHSA-2011-1853.html

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html

http://security.freebsd.org/patches/SA-11:08/telnetd.patch

SECUNIA-47357 (http://secunia.com/advisories/47357)

SECUNIA-46239 (http://secunia.com/advisories/46239)

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html

SECUNIA-47397 (http://secunia.com/advisories/47397)

SECUNIA-47373 (http://secunia.com/advisories/47373)

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00015.html

[freebsd-security] 20111223 Merry Christmas from the FreeBSD Security Team (http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006119.html)

SECUNIA-47441 (http://secunia.com/advisories/47441)

http://git.savannah.gnu.org/cgit/inetutils.git/commit?id=665f1e73cdd9b38e2d2e11b8db9958a315935592

http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt

http://www.redhat.com/support/errata/RHSA-2011-1851.html

EXPLOIT-DB-18280 (http://www.exploit-db.com/exploits/18280)

SECUNIA-47348 (http://secunia.com/advisories/47348)

SECTRACK-1026460 (http://www.securitytracker.com/id?1026460)

DSA-2373 (http://www.debian.org/security/2011/dsa-2373)

XF-multiple-telnetd-bo(71970) (https://exchange.xforce.ibmcloud.com/vulnerabilities/71970)

Miscellaneous

http://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc

Rapid7

Technical Analysis