CVE Tools
Sign in

CVE-2011-4862

Published: Dec 25, 2011Updated: Apr 29, 2026 Sources: CVE List NVD BDUCWE-120
NVD MITRE
10.0CVSSCRITICAL
EPSS Score
95.1%
Top 0.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LAu:NC:CI:CA:C
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Au:NAuthentication
None
Impact
C:CConfidentiality
Complete
I:CIntegrity
Complete
A:CAvailability
Complete
Open in CVSS calculator →

Weaknesses

CWE-120

Affected Products

n/an/a
inetutilsgnuOSS Libraries
heimdalheimdal project
On-prem
Security Products / endpoint-av-edr
krb5-applmit
Library
Operating Systems / unix-bsd
freebsdfreebsd
On-premOS
Operating Systems / unix-bsd
gnuoss-projectUSOSS Librariesaka g. nu
heimdal projectcommercialSecurity Productsaka heimdal
mitoss-projectUSOperating Systemsaka mit krb5, mit kerberos
freebsdoss-projectUSOperating Systems
and 7 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html
lists.opensuse.org
http://secunia.com/advisories/47399
secunia.com
http://www.debian.org/security/2011/dsa-2375
debian.org
and 40 more references View all →

Timeline

Published
Dec 25, 2011
Last Updated
Apr 29, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2011-4862 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows