F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301) - Nessus

High Plugin ID: 154888

This page contains detailed information about the F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301) 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: 154888
Name: F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301)
Filename: f5_bigip_SOL90011301.nasl
Vulnerability Published: 2019-03-25
This Plugin Published: 2021-11-04
Last Modification Time: 2021-11-08
Plugin Version: 1.2
Plugin Type: local
Plugin Family: F5 Networks Local Security Checks
Dependencies: f5_bigip_detect.nbin
Required KB Items [?]: Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version, Host/local_checks_enabled, Settings/ParanoidReport

Vulnerability Information

Severity: High
Vulnerability Published: 2019-03-25
Patch Published: 2020-09-18
CVE [?]: CVE-2019-3856, CVE-2019-3857, CVE-2019-3863
CPE [?]: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_application_visibility_and_reporting, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_link_controller, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/h:f5:big-ip

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

CVE-2019-3856

An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

CVE-2019-3857 An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

CVE-2019-3863 A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.

Impact

For CVE-2019-3856 and CVE-2019-3857, a remote attacker may be able to execute code on the client system when a user connects to the server.

For CVE-2019-3863, an attacker may be able to initiate a response from the server in which the message length causes an out-of-bounds memory write.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K90011301.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301) vulnerability:

GitHub: https://github.com/KorayAgaya/TrivyWeb
[CVE-2019-3856]
GitHub: https://github.com/siddharthraopotukuchi/trivy
[CVE-2019-3856]
GitHub: https://github.com/simiyo/trivy
[CVE-2019-3856]
GitHub: https://github.com/t31m0/Vulnerability-Scanner-for-Containers
[CVE-2019-3856]
GitHub: https://github.com/umahari/security
[CVE-2019-3856]
GitHub: https://github.com/KorayAgaya/TrivyWeb
[CVE-2019-3857]
GitHub: https://github.com/siddharthraopotukuchi/trivy
[CVE-2019-3857]
GitHub: https://github.com/simiyo/trivy
[CVE-2019-3857]
GitHub: https://github.com/t31m0/Vulnerability-Scanner-for-Containers
[CVE-2019-3857]
GitHub: https://github.com/umahari/security
[CVE-2019-3857]
GitHub: https://github.com/KorayAgaya/TrivyWeb
[CVE-2019-3863]
GitHub: https://github.com/siddharthraopotukuchi/trivy
[CVE-2019-3863]
GitHub: https://github.com/simiyo/trivy
[CVE-2019-3863]
GitHub: https://github.com/t31m0/Vulnerability-Scanner-for-Containers
[CVE-2019-3863]
GitHub: https://github.com/umahari/security
[CVE-2019-3863]

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 Score Source [?]: CVE-2019-3863
CVSS V2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C

CVSS Base Score:	6.8 (Medium)
Impact Subscore:	6.4
Exploitability Subscore:	8.6
CVSS Temporal Score:	5.0 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.0 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	7.7 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.7 (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 F5 Networks BIG-IP Solution K90011301.
#
# The text description of this plugin is (C) F5 Networks.
#

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

if (description)
{
  script_id(154888);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/11/08");

  script_cve_id("CVE-2019-3856", "CVE-2019-3857", "CVE-2019-3863");

  script_name(english:"F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301)");
  script_summary(english:"Checks the BIG-IP version.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote device is missing a vendor-supplied security patch."
  );
  script_set_attribute(
    attribute:"description",
    value:
"CVE-2019-3856

An integer overflow flaw, which could lead to an out of bounds write,
was discovered in libssh2 before 1.8.1 in the way keyboard prompt
requests are parsed. A remote attacker who compromises a SSH server
may be able to execute code on the client system when a user connects
to the server.

CVE-2019-3857 An integer overflow flaw which could lead to an out of
bounds write was discovered in libssh2 before 1.8.1 in the way
SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A
remote attacker who compromises a SSH server may be able to execute
code on the client system when a user connects to the server.

CVE-2019-3863 A flaw was found in libssh2 before 1.8.1. A server could
send a multiple keyboard interactive response messages whose total
length are greater than unsigned char max characters. This value is
used as an index to copy memory causing in an out of bounds memory
write error.

Impact

For CVE-2019-3856 and CVE-2019-3857, a remote attacker may be able to
execute code on the client system when a user connects to the server.

For CVE-2019-3863, an attacker may be able to initiate a response from
the server in which the message length causes an out-of-bounds memory
write."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K90011301"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K90011301."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3863");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_advanced_firewall_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_acceleration_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_security_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_visibility_and_reporting");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_global_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_link_controller");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_local_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_policy_enforcement_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/04");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"F5 Networks Local Security Checks");

  script_dependencies("f5_bigip_detect.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version", "Settings/ParanoidReport");

  exit(0);
}


include("f5_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
version = get_kb_item("Host/BIG-IP/version");
if ( ! version ) audit(AUDIT_OS_NOT, "F5 Networks BIG-IP");
if ( isnull(get_kb_item("Host/BIG-IP/hotfix")) ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/hotfix");
if ( ! get_kb_item("Host/BIG-IP/modules") ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/modules");

sol = "K90011301";
vmatrix = make_array();

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["AFM"]["unaffected"] = make_list("16.1.0");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["AM"]["unaffected"] = make_list("16.1.0");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["APM"]["unaffected"] = make_list("16.1.0");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["ASM"]["unaffected"] = make_list("16.1.0");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["AVR"]["unaffected"] = make_list("16.1.0");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["GTM"]["unaffected"] = make_list("16.1.0");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["LC"]["unaffected"] = make_list("16.1.0");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["LTM"]["unaffected"] = make_list("16.1.0");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("16.0.0-16.0.1","15.1.0-15.1.3","14.1.0-14.1.4","13.1.0-13.1.4","12.1.0-12.1.6");
vmatrix["PEM"]["unaffected"] = make_list("16.1.0");


if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  if (report_verbosity > 0) security_warning(port:0, extra:bigip_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = bigip_get_tested_modules();
  audit_extra = "For BIG-IP module(s) " + tested + ",";
  if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
  else audit(AUDIT_HOST_NOT, "running any of the affected modules");
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/f5_bigip_SOL90011301.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\f5_bigip_SOL90011301.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/f5_bigip_SOL90011301.nasl

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How to Run

Here is how to run the F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301) 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 F5 Networks Local Security Checks plugin family.
On the right side table select F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301) plugin ID 154888.
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 f5_bigip_SOL90011301.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a f5_bigip_SOL90011301.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - f5_bigip_SOL90011301.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 f5_bigip_SOL90011301.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

126451 - Oracle Linux 6 : libssh2 (ELSA-2019-1652)
126453 - RHEL 6 : libssh2 (RHSA-2019:1652)
126454 - Scientific Linux Security Update : libssh2 on SL6.x i386/x86_64 (20190702)
126480 - CentOS 6 : libssh2 (CESA-2019:1652)
126505 - Virtuozzo 6 : libssh2 / libssh2-devel / libssh2-docs (VZLSA-2019-1652)
126759 - RHEL 7 : libssh2 (RHSA-2019:1791)
127279 - NewStart CGSL CORE 5.04 / MAIN 5.04 : libssh2 Multiple Vulnerabilities (NS-SA-2019-0073)
127458 - NewStart CGSL MAIN 4.05 : libssh2 Multiple Vulnerabilities (NS-SA-2019-0169)
127584 - Oracle Linux 8 : virt:rhel (ELSA-2019-1175) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)
127630 - RHEL 7 : libssh2 (RHSA-2019:1943)
127716 - RHEL 7 : libssh2 (RHSA-2019:2399)
127810 - Amazon Linux AMI : libssh2 (ALAS-2019-1254)
128705 - NewStart CGSL MAIN 4.06 : libssh2 Multiple Vulnerabilities (NS-SA-2019-0179)
143452 - openSUSE Security Update : libssh2_org (openSUSE-2020-2129)
143507 - openSUSE Security Update : libssh2_org (openSUSE-2020-2126)
143867 - SUSE SLED15 / SLES15 Security Update : libssh2_org (SUSE-SU-2020:3551-1)
145681 - CentOS 8 : virt:rhel (CESA-2019:1175)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file f5_bigip_SOL90011301.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

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F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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