critical
10
CWE
120 119
Advisory Published
Updated

CVE-2011-4862: Buffer Overflow

First published: Sun Dec 25 2011(Updated: )

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.

Credit: secteam@freebsd.org

Affected SoftwareAffected VersionHow to fix
MIT krb5-appl<=1.0.2
FreeBSD FreeBSD>=7.3<=9.0
Heimdal<=1.5.1
Debian Inetutils Telnet<1.9
Fedora=16
Fedora=15
Debian=5.0
Debian=7.0
Debian=6.0
SUSE Linux Enterprise Desktop with Beagle=11-sp1
SUSE Linux Enterprise Server=9
openSUSE=11.4
openSUSE=11.3
SUSE Linux Enterprise Server=10-sp2
SUSE Linux Enterprise Software Development Kit=10-sp4
SUSE Linux Enterprise Server=11-sp1
SUSE Linux Enterprise Server=10-sp3
SUSE Linux Enterprise Desktop with Beagle=10-sp4
SUSE Linux Enterprise Server=10-sp4
SUSE Linux Enterprise Software Development Kit=11-sp1
suse linux enterprise server vmware=11-sp1

Remedy

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

Remedy

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

Remedy

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

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-4862?

    CVE-2011-4862 has a high severity rating due to its potential to allow remote code execution.

  • How do I fix CVE-2011-4862?

    To fix CVE-2011-4862, upgrade to the latest versions of the affected software listed in the vulnerability report.

  • Which software versions are affected by CVE-2011-4862?

    CVE-2011-4862 affects FreeBSD 7.3 through 9.0, MIT Kerberos krb5-appl 1.0.2 and earlier, Heimdal 1.5.1 and earlier, and GNU inetutils.

  • Can CVE-2011-4862 be exploited remotely?

    Yes, CVE-2011-4862 can be exploited remotely by attackers through the use of a lengthy encryption key.

  • Is there a known exploit for CVE-2011-4862?

    While specific exploits may not be publicly disclosed, the nature of CVE-2011-4862 indicates that it is vulnerable to remote code execution exploits.

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