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CVE-2011-4862

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.

Security Impact Summary

CVE-2011-4862 is a security vulnerability that . Impacting 10 products from gnu, from heimdal_project, from mit and 7 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-12-25T01:55:02.210

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 10.0 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

10.0

Weaknesses

Type: Primary
CWE-120

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	gnu	inetutils	< 1.9	Yes
Application	heimdal_project	heimdal	≤ 1.5.1	Yes
Application	mit	krb5-appl	≤ 1.0.2	Yes
Operating System	freebsd	freebsd	≤ 9.0	Yes
Operating System	fedoraproject	fedora	15	Yes
Operating System	fedoraproject	fedora	16	Yes
Operating System	debian	debian_linux	5.0	Yes
Operating System	debian	debian_linux	6.0	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	opensuse	opensuse	11.3	Yes
Operating System	opensuse	opensuse	11.4	Yes
Operating System	suse	linux_enterprise_desktop	10	Yes
Operating System	suse	linux_enterprise_desktop	11	Yes
Operating System	suse	linux_enterprise_server	9	Yes
Operating System	suse	linux_enterprise_server	10	Yes
Operating System	suse	linux_enterprise_server	10	Yes
Operating System	suse	linux_enterprise_server	10	Yes
Operating System	suse	linux_enterprise_server	11	Yes
Operating System	suse	linux_enterprise_server	11	Yes
Operating System	suse	linux_enterprise_software_development_kit	10	Yes
Operating System	suse	linux_enterprise_software_development_kit	11	Yes

References

http://archives.neohapsis.com/archives/bugtraq/2011-12/0172.html Broken Link ([email protected])
http://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=665f1e73cdd9b38e2d2e11b8db9958a315935592 Patch, Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071627.html Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071640.html Third Party Advisory ([email protected])
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006117.html Vendor Advisory ([email protected])
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006118.html Vendor Advisory ([email protected])
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006119.html Vendor Advisory ([email protected])
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006120.html Vendor Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00007.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00015.html Mailing List, Third Party Advisory ([email protected])
http://osvdb.org/78020 Broken Link ([email protected])
http://secunia.com/advisories/46239 Third Party Advisory ([email protected])
http://secunia.com/advisories/47341 Third Party Advisory ([email protected])
http://secunia.com/advisories/47348 Third Party Advisory ([email protected])
http://secunia.com/advisories/47357 Third Party Advisory ([email protected])
http://secunia.com/advisories/47359 Third Party Advisory ([email protected])
http://secunia.com/advisories/47373 Third Party Advisory ([email protected])
http://secunia.com/advisories/47374 Third Party Advisory ([email protected])
http://secunia.com/advisories/47397 Third Party Advisory ([email protected])
http://secunia.com/advisories/47399 Third Party Advisory ([email protected])
http://secunia.com/advisories/47441 Third Party Advisory ([email protected])
http://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc Mitigation, Vendor Advisory ([email protected])
http://security.freebsd.org/patches/SA-11:08/telnetd.patch Patch, Vendor Advisory ([email protected])
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt Patch, Vendor Advisory ([email protected])
http://www.debian.org/security/2011/dsa-2372 Third Party Advisory ([email protected])
http://www.debian.org/security/2011/dsa-2373 Third Party Advisory ([email protected])
http://www.debian.org/security/2011/dsa-2375 Third Party Advisory ([email protected])
http://www.exploit-db.com/exploits/18280/ Exploit, Third Party Advisory, VDB Entry ([email protected])
http://www.mandriva.com/security/advisories?name=MDVSA-2011:195 Third Party Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2011-1851.html Third Party Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2011-1852.html Third Party Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2011-1853.html Third Party Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2011-1854.html Third Party Advisory ([email protected])
http://www.securitytracker.com/id?1026460 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id?1026463 Third Party Advisory, VDB Entry ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/71970 Third Party Advisory, VDB Entry ([email protected])
http://archives.neohapsis.com/archives/bugtraq/2011-12/0172.html Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=665f1e73cdd9b38e2d2e11b8db9958a315935592 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071627.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071640.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006117.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006118.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006119.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006120.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00007.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00015.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://osvdb.org/78020 Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/46239 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47341 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47348 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47357 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47359 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47373 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47374 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47397 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47399 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/47441 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc Mitigation, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://security.freebsd.org/patches/SA-11:08/telnetd.patch Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2011/dsa-2372 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2011/dsa-2373 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2011/dsa-2375 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.exploit-db.com/exploits/18280/ Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.mandriva.com/security/advisories?name=MDVSA-2011:195 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2011-1851.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2011-1852.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2011-1853.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2011-1854.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id?1026460 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id?1026463 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/71970 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For gnu's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.