Executive Summary
This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
| Summary | |
|---|---|
| Title | krb5-appl security update |
| Informations | |||
|---|---|---|---|
| Name | RHSA-2011:1854 | First vendor Publication | 2011-12-28 |
| Vendor | RedHat | Last vendor Modification | 2011-12-28 |
| Severity (Vendor) | Critical | Revision | 01 |
Security-Database Scoring CVSS v3
| Cvss vector : N/A | |||
|---|---|---|---|
| Overall CVSS Score | NA | ||
| Base Score | NA | Environmental Score | NA |
| impact SubScore | NA | Temporal Score | NA |
| Exploitabality Sub Score | NA | ||
| Calculate full CVSS 3.0 Vectors scores | |||
Security-Database Scoring CVSS v2
| Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C) | |||
|---|---|---|---|
| Cvss Base Score | 10 | Attack Range | Network |
| Cvss Impact Score | 10 | Attack Complexity | Low |
| Cvss Expoit Score | 10 | Authentication | None Required |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
| Problem Description: Updated krb5-appl packages that fix one security issue are now available for Red Hat Enterprise Linux 6.0 and 6.1 Extended Update Support. The Red Hat Security Response Team has rated this update as having critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server EUS (v. 6.0) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server EUS (v. 6.1) - i386, ppc64, s390x, x86_64 3. Description: The krb5-appl packages provide Kerberos-aware telnet, ftp, rcp, rsh, and rlogin clients and servers. Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC). A buffer overflow flaw was found in the MIT krb5 telnet daemon (telnetd). A remote attacker who can access the telnet port of a target machine could use this flaw to execute arbitrary code as root. (CVE-2011-4862) Note that the krb5 telnet daemon is not enabled by default in any version of Red Hat Enterprise Linux. In addition, the default firewall rules block remote access to the telnet port. This flaw does not affect the telnet daemon distributed in the telnet-server package. For users who have installed the krb5-appl-servers package, have enabled the krb5 telnet daemon, and have it accessible remotely, this update should be applied immediately. All krb5-appl-server users should upgrade to these updated packages, which contain a backported patch to correct this issue. 4. Solution: The krb5 telnet daemon is an xinetd service. You can determine if krb5 telnetd is enabled with the commands: /sbin/chkconfig --list krb5-telnet /sbin/chkconfig --list ekrb5-telnet The output of these command will display "on" if krb5 telnet is enabled. krb5 telnet daemon can be immediately disabled with the commands: /sbin/chkconfig krb5-telnet off /sbin/chkconfig ekrb5-telnet off Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 770325 - CVE-2011-4862 krb5: remote buffer overflow in kerberized telnet daemon |
Original Source
| Url : https://rhn.redhat.com/errata/RHSA-2011-1854.html |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (CWE/SANS Top 25) |
OVAL Definitions
| Definition Id: oval:org.mitre.oval:def:15084 | |||
| Oval ID: | oval:org.mitre.oval:def:15084 | ||
| Title: | DSA-2372-1 heimdal -- buffer overflow | ||
| Description: | It was discovered that the Kerberos support for telnetd contains a pre-authentication buffer overflow, which may enable remote attackers who can connect to the Telnet to execute arbitrary code with root privileges. | ||
| Family: | unix | Class: | patch |
| Reference(s): | DSA-2372-1 CVE-2011-4862 | Version: | 5 |
| Platform(s): | Debian GNU/Linux 5.0 Debian GNU/Linux 6.0 Debian GNU/kFreeBSD 6.0 | Product(s): | heimdal |
| Definition Synopsis: | |||
| |||
| Definition Id: oval:org.mitre.oval:def:15151 | |||
| Oval ID: | oval:org.mitre.oval:def:15151 | ||
| Title: | DSA-2375-1 krb5 -- buffer overflow | ||
| Description: | It was discovered that the encryption support for BSD telnetd contains a pre-authentication buffer overflow, which may enable remote attackers who can connect to the Telnet port to execute arbitrary code with root privileges. | ||
| Family: | unix | Class: | patch |
| Reference(s): | DSA-2375-1 CVE-2011-4862 | Version: | 5 |
| Platform(s): | Debian GNU/Linux 5.0 Debian GNU/Linux 6.0 Debian GNU/kFreeBSD 6.0 | Product(s): | krb5 |
| Definition Synopsis: | |||
| |||
| Definition Id: oval:org.mitre.oval:def:15184 | |||
| Oval ID: | oval:org.mitre.oval:def:15184 | ||
| Title: | DSA-2373-1 inetutils -- buffer overflow | ||
| Description: | It was discovered that the Kerberos support for telnetd contains a pre-authentication buffer overflow, which may enable remote attackers who can connect to the Telnet to execute arbitrary code with root privileges. | ||
| Family: | unix | Class: | patch |
| Reference(s): | DSA-2373-1 CVE-2011-4862 | Version: | 5 |
| Platform(s): | Debian GNU/Linux 5.0 Debian GNU/Linux 6.0 Debian GNU/kFreeBSD 6.0 | Product(s): | inetutils |
| Definition Synopsis: | |||
| |||
| Definition Id: oval:org.mitre.oval:def:20405 | |||
| Oval ID: | oval:org.mitre.oval:def:20405 | ||
| Title: | VMware ESXi and ESX address several security issues | ||
| 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. | ||
| Family: | unix | Class: | vulnerability |
| Reference(s): | CVE-2011-4862 | Version: | 4 |
| Platform(s): | VMWare ESX Server 4.0 | Product(s): | |
| Definition Synopsis: | |||
| |||
| Definition Id: oval:org.mitre.oval:def:22108 | |||
| Oval ID: | oval:org.mitre.oval:def:22108 | ||
| Title: | RHSA-2011:1852: krb5-appl security update (Critical) | ||
| 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. | ||
| Family: | unix | Class: | patch |
| Reference(s): | RHSA-2011:1852-02 CESA-2011:1852 CVE-2011-4862 | Version: | 4 |
| Platform(s): | Red Hat Enterprise Linux 6 CentOS Linux 6 | Product(s): | krb5-appl |
| Definition Synopsis: | |||
| |||
| Definition Id: oval:org.mitre.oval:def:22146 | |||
| Oval ID: | oval:org.mitre.oval:def:22146 | ||
| Title: | RHSA-2011:1851: krb5 security update (Critical) | ||
| 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. | ||
| Family: | unix | Class: | patch |
| Reference(s): | RHSA-2011:1851-02 CESA-2011:1851 CVE-2011-4862 | Version: | 4 |
| Platform(s): | Red Hat Enterprise Linux 5 CentOS Linux 5 | Product(s): | krb5 |
| Definition Synopsis: | |||
| |||
| Definition Id: oval:org.mitre.oval:def:23239 | |||
| Oval ID: | oval:org.mitre.oval:def:23239 | ||
| Title: | ELSA-2011:1851: krb5 security update (Critical) | ||
| 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. | ||
| Family: | unix | Class: | patch |
| Reference(s): | ELSA-2011:1851-02 CVE-2011-4862 | Version: | 6 |
| Platform(s): | Oracle Linux 5 | Product(s): | krb5 |
| Definition Synopsis: | |||
| |||
| Definition Id: oval:org.mitre.oval:def:23380 | |||
| Oval ID: | oval:org.mitre.oval:def:23380 | ||
| Title: | ELSA-2011:1852: krb5-appl security update (Critical) | ||
| 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. | ||
| Family: | unix | Class: | patch |
| Reference(s): | ELSA-2011:1852-02 CVE-2011-4862 | Version: | 6 |
| Platform(s): | Oracle Linux 6 | Product(s): | krb5-appl |
| Definition Synopsis: | |||
| Definition Id: oval:org.mitre.oval:def:27975 | |||
| Oval ID: | oval:org.mitre.oval:def:27975 | ||
| Title: | DEPRECATED: ELSA-2011-1852 -- krb5-appl security update (critical) | ||
| Description: | [1.0.1-7] - Correct patch, bump release [1.0.1-6] - Fix for CVE-2011-4862 | ||
| Family: | unix | Class: | patch |
| Reference(s): | ELSA-2011-1852 CVE-2011-4862 | Version: | 4 |
| Platform(s): | Oracle Linux 6 | Product(s): | krb5-appl |
| Definition Synopsis: | |||
CPE : Common Platform Enumeration
SAINT Exploits
| Description | Link |
|---|---|
| Telnetd Encryption Key ID Code Execution | More info here |
OpenVAS Exploits
| Date | Description |
|---|---|
| 2012-08-02 | Name : SuSE Update for krb5-appl openSUSE-SU-2012:0051-1 (krb5-appl) File : nvt/gb_suse_2012_0051_1.nasl |
| 2012-08-02 | Name : SuSE Update for krb5-appl openSUSE-SU-2012:0019-1 (krb5-appl) File : nvt/gb_suse_2012_0019_1.nasl |
| 2012-07-30 | Name : CentOS Update for krb5-devel CESA-2011:1851 centos4 File : nvt/gb_CESA-2011_1851_krb5-devel_centos4.nasl |
| 2012-07-30 | Name : CentOS Update for krb5-devel CESA-2011:1851 centos5 File : nvt/gb_CESA-2011_1851_krb5-devel_centos5.nasl |
| 2012-07-30 | Name : CentOS Update for krb5-appl-clients CESA-2011:1852 centos6 File : nvt/gb_CESA-2011_1852_krb5-appl-clients_centos6.nasl |
| 2012-07-09 | Name : RedHat Update for krb5-appl RHSA-2011:1852-02 File : nvt/gb_RHSA-2011_1852-02_krb5-appl.nasl |
| 2012-04-02 | Name : VMSA-2012-0006 VMware ESXi and ESX address several security issues File : nvt/gb_VMSA-2012-0006.nasl |
| 2012-03-19 | Name : Fedora Update for krb5-appl FEDORA-2011-17493 File : nvt/gb_fedora_2011_17493_krb5-appl_fc16.nasl |
| 2012-03-12 | Name : Gentoo Security Advisory GLSA 201202-05 (heimdal) File : nvt/glsa_201202_05.nasl |
| 2012-02-12 | Name : Gentoo Security Advisory GLSA 201201-14 (mit-krb5-appl) File : nvt/glsa_201201_14.nasl |
| 2012-02-11 | Name : Debian Security Advisory DSA 2373-1 (inetutils) File : nvt/deb_2373_1.nasl |
| 2012-02-11 | Name : Debian Security Advisory DSA 2372-1 (heimdal) File : nvt/deb_2372_1.nasl |
| 2012-01-09 | Name : Fedora Update for krb5-appl FEDORA-2011-17492 File : nvt/gb_fedora_2011_17492_krb5-appl_fc15.nasl |
| 2011-12-30 | Name : RedHat Update for krb5 RHSA-2011:1851-01 File : nvt/gb_RHSA-2011_1851-01_krb5.nasl |
| 2011-12-30 | Name : Mandriva Update for krb5-appl MDVSA-2011:195 (krb5-appl) File : nvt/gb_mandriva_MDVSA_2011_195.nasl |
| 2011-12-28 | Name : FreeBSD 'telnetd' Daemon Remote Buffer Overflow Vulnerability File : nvt/gb_freebsd_telnetd_51182.nasl |
| 0000-00-00 | Name : FreeBSD Ports: krb5-appl File : nvt/freebsd_krb5-appl.nasl |
Open Source Vulnerability Database (OSVDB)
| Id | Description |
|---|---|
| 78020 | FreeBSD telnetd Multiple telnet/libtelnet/encrypt.c encrypt_keyid() Function ... |
Information Assurance Vulnerability Management (IAVM)
| Date | Description |
|---|---|
| 2012-04-12 | IAVM : 2012-A-0056 - Multiple Vulnerabilities in VMWare ESX 4.0 and ESXi 4.0 Severity : Category I - VMSKEY : V0031979 |
Snort® IPS/IDS
| Date | Description |
|---|---|
| 2014-01-10 | FreeBSD telnetd dec_keyid overflow attempt RuleID : 20813 - Revision : 9 - Type : PROTOCOL-TELNET |
| 2014-01-10 | FreeBSD telnetd enc_keyid overflow attempt RuleID : 20812 - Revision : 9 - Type : PROTOCOL-TELNET |
Nessus® Vulnerability Scanner
| Date | Description |
|---|---|
| 2016-03-03 | Name : The remote VMware ESXi / ESX host is missing a security-related patch. File : vmware_VMSA-2012-0006_remote.nasl - Type : ACT_GATHER_INFO |
| 2015-01-19 | Name : The remote Solaris system is missing a security patch for third-party software. File : solaris11_telnet_20120404.nasl - Type : ACT_GATHER_INFO |
| 2014-11-26 | Name : The remote OracleVM host is missing one or more security updates. File : oraclevm_OVMSA-2011-0015.nasl - Type : ACT_GATHER_INFO |
| 2014-11-17 | Name : The remote security appliance is missing a vendor-supplied patch. File : cisco-sa-20120126-wsa.nasl - Type : ACT_GATHER_INFO |
| 2014-11-17 | Name : The remote security appliance is missing a vendor-supplied patch. File : cisco-sa-20120126-sma.nasl - Type : ACT_GATHER_INFO |
| 2014-11-17 | Name : The remote security appliance is missing a vendor-supplied security patch. File : cisco-sa-20120126-esa.nasl - Type : ACT_GATHER_INFO |
| 2014-06-13 | Name : The remote openSUSE host is missing a security update. File : suse_11_4_krb5-appl-111229.nasl - Type : ACT_GATHER_INFO |
| 2014-06-13 | Name : The remote openSUSE host is missing a security update. File : suse_11_3_krb5-appl-111229.nasl - Type : ACT_GATHER_INFO |
| 2014-06-13 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2012-17.nasl - Type : ACT_GATHER_INFO |
| 2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2011-1851.nasl - Type : ACT_GATHER_INFO |
| 2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2011-1852.nasl - Type : ACT_GATHER_INFO |
| 2013-01-24 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2011-1853.nasl - Type : ACT_GATHER_INFO |
| 2013-01-24 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2011-1854.nasl - Type : ACT_GATHER_INFO |
| 2012-08-01 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20111227_krb5_appl_on_SL6_x.nasl - Type : ACT_GATHER_INFO |
| 2012-08-01 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20111227_krb5_on_SL4_x.nasl - Type : ACT_GATHER_INFO |
| 2012-03-30 | Name : The remote VMware ESXi / ESX host is missing one or more security-related pat... File : vmware_VMSA-2012-0006.nasl - Type : ACT_GATHER_INFO |
| 2012-02-23 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201202-05.nasl - Type : ACT_GATHER_INFO |
| 2012-01-24 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201201-14.nasl - Type : ACT_GATHER_INFO |
| 2012-01-12 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-2372.nasl - Type : ACT_GATHER_INFO |
| 2012-01-12 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-2373.nasl - Type : ACT_GATHER_INFO |
| 2012-01-12 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-2375.nasl - Type : ACT_GATHER_INFO |
| 2012-01-06 | Name : The remote Fedora host is missing a security update. File : fedora_2011-17493.nasl - Type : ACT_GATHER_INFO |
| 2012-01-06 | Name : The remote Fedora host is missing a security update. File : fedora_2011-17492.nasl - Type : ACT_GATHER_INFO |
| 2012-01-03 | Name : The remote SuSE 11 host is missing one or more security updates. File : suse_11_krb5-111229.nasl - Type : ACT_GATHER_INFO |
| 2012-01-03 | Name : The remote SuSE 10 host is missing a security-related patch. File : suse_krb5-7899.nasl - Type : ACT_GATHER_INFO |
| 2011-12-29 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2011-195.nasl - Type : ACT_GATHER_INFO |
| 2011-12-28 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2011-1852.nasl - Type : ACT_GATHER_INFO |
| 2011-12-28 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2011-1851.nasl - Type : ACT_GATHER_INFO |
| 2011-12-28 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2011-1851.nasl - Type : ACT_GATHER_INFO |
| 2011-12-28 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2011-1852.nasl - Type : ACT_GATHER_INFO |
| 2011-12-27 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_4ddc78dc300a11e1a2aa0016ce01e285.nasl - Type : ACT_GATHER_INFO |
Alert History
| Date | Informations |
|---|---|
| 2014-02-17 11:55:28 |
|
