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CVE Record

CVE-2011-4862: Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT Kerberos Version 5 Applic...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-2011-4862 is a buffer overflow in telnetd encryption handling. A remote attacker could potentially run code on affected systems by abusing an overly long encryption key. The strongest concern is exposed Telnet services on legacy FreeBSD, Kerberos application, Heimdal, or GNU inetutils installations. Exposure is most likely on legacy Unix or Linux systems still running telnetd with encryption support from the affected packages. Modern environments that disabled Telnet or never installed these packages are unlikely to be exposed. Treat as urgent only where Telnet is enabled on legacy systems. Remote code execution plus historical exploitation makes exposed instances high business risk, but many modern environments will have no exposure if Telnet is absent. Mitigation focus: Apply vendor updates for affected FreeBSD, krb5-appl, Heimdal, or inetutils packages.; Disable telnetd where not required; use SSH for remote administration.; Restrict Telnet access to trusted management networks until patched..

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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Affected products

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Weakness

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