Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195) - Nessus

Critical Plugin ID: 57412

This page contains detailed information about the Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 57412
Name: Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195)
Filename: mandriva_MDVSA-2011-195.nasl
Vulnerability Published: N/A
This Plugin Published: 2011-12-29
Last Modification Time: 2021-01-06
Plugin Version: 1.13
Plugin Type: local
Plugin Family: Mandriva Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/Mandrake/release, Host/Mandrake/rpm-list

Vulnerability Information

Severity: Critical
Vulnerability Published: N/A
Patch Published: 2011-12-28
CVE [?]: CVE-2011-4862
CPE [?]: cpe:/o:mandriva:linux:2010.1, cpe:/o:mandriva:linux:2011, p-cpe:/a:mandriva:linux:krb5-appl-clients, p-cpe:/a:mandriva:linux:krb5-appl-servers, p-cpe:/a:mandriva:linux:netkit-telnet, p-cpe:/a:mandriva:linux:netkit-telnet-server
Exploited by Malware: True

Synopsis

The remote Mandriva Linux host is missing one or more security updates.

Description

A vulnerability has been discovered and corrected in krb5-appl, heimdal and netkit-telnet :

An unauthenticated remote attacker can cause a buffer overflow and probably execute arbitrary code with the privileges of the telnet daemon (CVE-2011-4862).

In Mandriva the telnetd daemon from the netkit-telnet-server package does not have an initscript to start and stop the service, however one could rather easily craft an initscript or start the service by other means rendering the system vulnerable to this issue.

The updated packages have been patched to correct this issue.

Solution

Update the affected packages.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, ExploitHub, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195) vulnerability:

Metasploit: exploit/linux/telnet/telnet_encrypt_keyid
[Linux BSD-derived Telnet Service Encryption Key ID Buffer Overflow]
Metasploit: exploit/freebsd/telnet/telnet_encrypt_keyid
[FreeBSD Telnet Service Encryption Key ID Buffer Overflow]
Metasploit: auxiliary/scanner/telnet/telnet_encrypt_overflow
[Telnet Service Encryption Key ID Overflow Detection]
Exploit-DB: exploits/linux/remote/18368.rb
[EDB-18368: Linux BSD-derived Telnet Service Encryption Key ID - Remote Buffer Overflow (Metasploit)]
Exploit-DB: exploits/bsd/remote/18369.rb
[EDB-18369: FreeBSD - Telnet Service Encryption Key ID Buffer Overflow (Metasploit)]
GitHub: https://github.com/Snoopy-Sec/Localroot-ALL-CVE
[CVE-2011-4862]
GitHub: https://github.com/anoaghost/Localroot_Compile
[CVE-2011-4862]
GitHub: https://github.com/hdbreaker/GO-CVE-2011-4862
[CVE-2011-4862: Go Exploit for CVE-2011-4862]
GitHub: https://github.com/kpawar2410/CVE-2011-4862
[CVE-2011-4862: Final Project for Security and Privacy CS 600.443]
GitHub: https://github.com/lol-fi/cve-2011-4862
[CVE-2011-4862]
ExploitHub: EH-11-760

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Base Score:	10.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	10.0
CVSS Temporal Score:	NA (None)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	10.0 (High)

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Plugin Source

#%NASL_MIN_LEVEL 70300

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2011:195. 
# The text itself is copyright (C) Mandriva S.A.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(57412);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2011-4862");
  script_xref(name:"MDVSA", value:"2011:195");

  script_name(english:"Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A vulnerability has been discovered and corrected in krb5-appl,
heimdal and netkit-telnet :

An unauthenticated remote attacker can cause a buffer overflow and
probably execute arbitrary code with the privileges of the telnet
daemon (CVE-2011-4862).

In Mandriva the telnetd daemon from the netkit-telnet-server package
does not have an initscript to start and stop the service, however one
could rather easily craft an initscript or start the service by other
means rendering the system vulnerable to this issue.

The updated packages have been patched to correct this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-008.txt"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploithub_sku", value:"EH-11-760");
  script_set_attribute(attribute:"exploit_framework_exploithub", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Linux BSD-derived Telnet Service Encryption Key ID Buffer Overflow');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:krb5-appl-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:krb5-appl-servers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:netkit-telnet");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:netkit-telnet-server");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2010.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2011");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/12/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/12/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2021 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK2010.1", reference:"krb5-appl-clients-1.0-4.2mdv2010.2", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2010.1", reference:"krb5-appl-servers-1.0-4.2mdv2010.2", yank:"mdv")) flag++;

if (rpm_check(release:"MDK2011", reference:"krb5-appl-clients-1.0.2-1.1-mdv2011.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2011", reference:"krb5-appl-servers-1.0.2-1.1-mdv2011.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2011", reference:"netkit-telnet-0.17-12.1-mdv2011.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2011", reference:"netkit-telnet-server-0.17-12.1-mdv2011.0", yank:"mdv")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/mandriva_MDVSA-2011-195.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\mandriva_MDVSA-2011-195.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/mandriva_MDVSA-2011-195.nasl

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How to Run

Here is how to run the Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Mandriva Local Security Checks plugin family.
On the right side table select Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195) plugin ID 57412.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl mandriva_MDVSA-2011-195.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a mandriva_MDVSA-2011-195.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - mandriva_MDVSA-2011-195.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state mandriva_MDVSA-2011-195.nasl -t <IP/HOST>

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References

MDVSA | Mandriva Security Advisory:

2011:195

See also:

Similar and related Nessus plugins:

57405 - CentOS 4 / 5 : krb5 (CESA-2011:1851)
57406 - CentOS 6 : krb5-appl (CESA-2011:1852)
79271 - Cisco Email Security Appliance Telnet Remote Code Execution (cisco-sa-20120126-ironport)
79272 - Cisco Content Security Management Appliance Telnet Remote Code Execution (cisco-sa-20120126-ironport)
79273 - Cisco Web Security Appliance Telnet Remote Code Execution (cisco-sa-20120126-ironport)
57512 - Debian DSA-2372-1 : heimdal - buffer overflow
57513 - Debian DSA-2373-1 : inetutils - buffer overflow
57515 - Debian DSA-2375-1 : krb5, krb5-appl - buffer overflow
57442 - Fedora 15 : krb5-appl-1.0.1-8.fc15 (2011-17492)
57443 - Fedora 16 : krb5-appl-1.0.2-2.fc16 (2011-17493)
57403 - FreeBSD : krb5-appl -- telnetd code execution vulnerability (4ddc78dc-300a-11e1-a2aa-0016ce01e285)
57656 - GLSA-201201-14 : MIT Kerberos 5 Applications: Multiple vulnerabilities
58101 - GLSA-201202-05 : Heimdal: Arbitrary code execution
74578 - openSUSE Security Update : krb5-appl (openSUSE-2012-17)
68412 - Oracle Linux 4 / 5 : krb5 (ELSA-2011-1851)
68413 - Oracle Linux 6 : krb5-appl (ELSA-2011-1852)
79475 - OracleVM 2.2 : krb5 (OVMSA-2011-0015)
57408 - RHEL 4 / 5 : krb5 (RHSA-2011:1851)
57409 - RHEL 6 : krb5-appl (RHSA-2011:1852)
64017 - RHEL 5 : krb5 (RHSA-2011:1853)
64018 - RHEL 6 : krb5-appl (RHSA-2011:1854)
61213 - Scientific Linux Security Update : krb5-appl on SL6.x i386/x86_64
61214 - Scientific Linux Security Update : krb5 on SL4.x, SL5.x i386/x86_64
80781 - Oracle Solaris Third-Party Patch Update : telnet (cve_2011_4862_buffer_overflow)
75564 - openSUSE Security Update : krb5-appl (openSUSE-SU-2012:0019-1)
75886 - openSUSE Security Update : krb5-appl (openSUSE-SU-2012:0019-1)
57430 - SuSE 11.1 Security Update : Kerberos 5 (SAT Patch Number 5594)
57431 - SuSE 10 Security Update : Kerberos 5 (ZYPP Patch Number 7899)
57462 - FreeBSD 'telnetd' Daemon Remote Buffer Overflow
58535 - VMSA-2012-0006 : VMware Workstation, ESXi, and ESX address several security issues
89107 - VMware ESX / ESXi Multiple Vulnerabilities (VMSA-2012-0006) (remote check)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file mandriva_MDVSA-2011-195.nasl version 1.13. For more plugins, visit the Nessus Plugin Library.

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Mandriva Linux Security Advisory : krb5-appl (MDVSA-2011:195) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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