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Short Name

TELNET:OVERFLOW:BSD-ENCRY-KEYID

Severity

High

Recommended

Yes

Recommended Action

Drop

Category

TELNET

Keywords

Multiple Vendors BSD telnetd Encryption Key Buffer Overflow

Release Date

2012/01/19

Update Number

2066

Supported Platforms

idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+

TELNET: Multiple Vendors BSD telnetd Encryption Key Buffer Overflow


This signature detects attempts to exploit a known flaw in BSD telnetd. The vulnerability is due to the copying of an encryption key into a fixed-length buffer without validation of the key's length. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted packet to telnetd. A successful exploitation attempt could result in the execution of arbitrary code in the security context of the Telnet daemon.

Extended Description

FreeBSD is prone to a remote buffer-overflow vulnerability. Exploiting this issue allows remote attackers to execute arbitrary code with superuser privileges. Successfully exploiting this issue will completely compromise affected computers.

Affected Products

  • Cisco IronPort Email Security Appliance C-Series 7.0.1
  • Cisco IronPort Email Security Appliance C-Series
  • Cisco IronPort Email Security Appliance X-Series 7.0.1
  • Cisco IronPort Email Security Appliance X-Series
  • Cisco IronPort Security Management Appliance
  • Debian Linux 6.0 amd64
  • Debian Linux 6.0 arm
  • Debian Linux 6.0 ia-32
  • Debian Linux 6.0 ia-64
  • Debian Linux 6.0 mips
  • Debian Linux 6.0 powerpc
  • Debian Linux 6.0 s/390
  • Debian Linux 6.0 sparc
  • FreeBSD Freebsd 7.1 -RELEASE-p14
  • FreeBSD Freebsd 7.1-RELENG
  • FreeBSD Freebsd 7.2
  • FreeBSD Freebsd 7.3
  • FreeBSD Freebsd 7.3-RELEASE
  • FreeBSD Freebsd 7.3-RELEASE-p3
  • FreeBSD Freebsd 7.3-RELEASE-p6
  • FreeBSD Freebsd 7.3 - RELEASE - p7
  • FreeBSD Freebsd 7.3-RELENG
  • FreeBSD Freebsd 7.4
  • FreeBSD Freebsd 7.4-RELEASE-p2
  • FreeBSD Freebsd 7.4 -RELEASE-p3
  • FreeBSD Freebsd 7.4-STABLE
  • FreeBSD Freebsd 8.0
  • FreeBSD Freebsd 8.0-RC1
  • FreeBSD Freebsd 8.0 -RELEASE-p5
  • FreeBSD Freebsd 8.1
  • FreeBSD Freebsd 8.1-RELEASE-p1
  • FreeBSD Freebsd 8.1-RELEASE-p4
  • FreeBSD Freebsd 8.1-RELEASE-p5
  • FreeBSD Freebsd 8.1-RELENG
  • FreeBSD Freebsd 8.1-STABLE
  • FreeBSD Freebsd 8.2
  • FreeBSD Freebsd 8.2-RELEASE-p1
  • FreeBSD Freebsd 8.2-RELEASE-p2
  • FreeBSD Freebsd 8.2 - RELEASE -p3
  • FreeBSD Freebsd 8.2-STABLE
  • FreeBSD Freebsd 8.2-STABLE
  • FreeBSD Freebsd 8-RELENG
  • FreeBSD Freebsd 9.0-RC1
  • FreeBSD Freebsd 9.0-RC3
  • FreeBSD Freebsd 9.0-RELEASE
  • FreeBSD Freebsd 9.0-STABLE
  • FreeBSD 7.0
  • FreeBSD 7.0 BETA4
  • FreeBSD 7.0 -PRERELEASE
  • FreeBSD 7.0-RELEASE
  • FreeBSD 7.0-RELEASE-P11
  • FreeBSD 7.0-RELEASE-P12
  • FreeBSD 7.0-RELEASE-P3
  • FreeBSD 7.0-RELEASE-P8
  • FreeBSD 7.0 -RELEASE-P9
  • FreeBSD 7.0 -RELENG
  • FreeBSD 7.0-STABLE
  • FreeBSD 7.1
  • FreeBSD 7.1 -PRE-RELEASE
  • FreeBSD 7.1 Rc1
  • FreeBSD 7.1 -RELEASE-P1
  • FreeBSD 7.1 -RELEASE-P2
  • FreeBSD 7.1-RELEASE-P4
  • FreeBSD 7.1-RELEASE-P5
  • FreeBSD 7.1-RELEASE-P6
  • FreeBSD 7.1-STABLE
  • FreeBSD 7.2-PRERELEASE
  • FreeBSD 7.2-RC2
  • FreeBSD 7.2-RELEASE-P1
  • FreeBSD 7.2-RELEASE-P4
  • FreeBSD 7.2-STABLE
  • FreeBSD 7.3-RELEASE-P1
  • FreeBSD 7.3-STABLE
  • FreeBSD 8.0-RELEASE
  • FreeBSD 8.0-STABLE
  • FreeBSD 8.1-PRERELEASE
  • FreeBSD 8.1-RELEASE
  • Gentoo Linux
  • Mandriva Enterprise Server 5
  • Mandriva Enterprise Server 5 X86 64
  • Mandriva Linux Mandrake 2010.1
  • Mandriva Linux Mandrake 2010.1 X86 64
  • Mandriva Linux Mandrake 2011
  • Mandriva Linux Mandrake 2011 x86_64
  • MIT Kerberos 5 1.0.0
  • MIT Kerberos 5 1.0.6
  • MIT Kerberos 5 1.0.8
  • MIT Kerberos 5 1.1.0
  • MIT Kerberos 5 1.1.1
  • MIT Kerberos 5 1.2.0
  • MIT Kerberos 5 1.2.1
  • MIT Kerberos 5 1.2.2
  • MIT Kerberos 5 1.2.2 -Beta1
  • MIT Kerberos 5 1.2.3
  • MIT Kerberos 5 1.2.4
  • MIT Kerberos 5 1.2.5
  • MIT Kerberos 5 1.2.6
  • MIT Kerberos 5 1.2.7
  • MIT Kerberos 5 1.2.8
  • MIT Kerberos 5 1.3.0
  • MIT Kerberos 5 1.3.0 -Alpha1
  • MIT Kerberos 5 1.3.1
  • MIT Kerberos 5 1.3.2
  • MIT Kerberos 5 1.3.3
  • MIT Kerberos 5 1.3.4
  • MIT Kerberos 5 1.3.5
  • MIT Kerberos 5 1.3.6
  • MIT Kerberos 5 1.4.0
  • MIT Kerberos 5 1.4.1
  • MIT Kerberos 5 1.4.2
  • MIT Kerberos 5 1.4.3
  • MIT Kerberos 5 1.5.0
  • MIT Kerberos 5 1.5.1
  • MIT Kerberos 5 1.5.2
  • MIT Kerberos 5 1.5.3
  • MIT Kerberos 5 1.5.4
  • MIT Kerberos 5 1.5.5
  • MIT Kerberos 5 1.6.0
  • MIT Kerberos 5 1.6.1
  • MIT Kerberos 5 1.6.2
  • MIT Kerberos 5 1.6.3
  • MIT Kerberos 5 1.6.4
  • MIT Kerberos 5 1.7
  • MIT Kerberos 5 1.7.1
  • MIT Kerberos 5 1.7.2
  • Oracle Enterprise Linux 4
  • Oracle Enterprise Linux 5
  • Oracle Enterprise Linux 6
  • Oracle Enterprise Linux 6.2
  • Red Hat Enterprise Linux 5 Server
  • Red Hat Enterprise Linux AS 4
  • Red Hat Enterprise Linux Desktop 4.0
  • Red Hat Enterprise Linux Desktop 5 Client
  • Red Hat Enterprise Linux Desktop 6
  • Red Hat Enterprise Linux Desktop Workstation 5 Client
  • Red Hat Enterprise Linux ES 4
  • Red Hat Enterprise Linux HPC Node 6
  • Red Hat Enterprise Linux Server 6
  • Red Hat Enterprise Linux Server 6.0.z
  • Red Hat Enterprise Linux Workstation 6
  • Red Hat Enterprise Linux WS 4
  • Red Hat Fedora 15
  • Red Hat Fedora 16
  • SuSE CORE 9
  • SuSE openSUSE 11.3
  • SuSE openSUSE 11.4
  • SuSE SUSE CORE 9 for x86
  • SuSE SUSE Linux Enterprise Desktop 10 SP4
  • SuSE SUSE Linux Enterprise Desktop 11 SP1
  • SuSE SUSE Linux Enterprise SDK 10 SP4
  • SuSE SUSE Linux Enterprise SDK 11 SP1
  • SuSE SUSE Linux Enterprise Server 10 SP2
  • SuSE SUSE Linux Enterprise Server 10 SP3 LTSS
  • SuSE SUSE Linux Enterprise Server 10 SP4
  • SuSE SUSE Linux Enterprise Server 11 SP1
  • SuSE SUSE Linux Enterprise Server for VMware 11 SP1
  • VMWare ESX 4.0

References

  • BugTraq: 51182
  • CVE: CVE-2011-4862
  • URL: http://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc
  • URL: http://rhn.redhat.com/errata/RHSA-2011-1851.html
  • URL: http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt

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