OpenSSL 1.0.2 < 1.0.2zd Vulnerability - Nessus

High Plugin ID: 158973

This page contains detailed information about the OpenSSL 1.0.2 < 1.0.2zd Vulnerability 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: 158973
Name: OpenSSL 1.0.2 < 1.0.2zd Vulnerability
Filename: openssl_1_0_2zd.nasl
Vulnerability Published: 2022-03-15
This Plugin Published: 2022-03-16
Last Modification Time: 2022-03-23
Plugin Version: 1.4
Plugin Type: remote
Plugin Family: Web Servers
Dependencies: openssl_version.nasl
Required KB Items [?]: openssl/port

Vulnerability Information

Severity: High
Vulnerability Published: 2022-03-15
Patch Published: 2022-03-15
CVE [?]: CVE-2022-0778
CPE [?]: cpe:/a:openssl:openssl

Synopsis

The remote service is affected by a vulnerability.

Description

The version of OpenSSL installed on the remote host is prior to 1.0.2zd. It is, therefore, affected by a vulnerability as referenced in the 1.0.2zd advisory.

- The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self- signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc). (CVE-2022-0778)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to OpenSSL version 1.0.2zd or later.

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 OpenSSL 1.0.2 < 1.0.2zd Vulnerability vulnerability:

GitHub: https://github.com/BobTheShoplifter/CVE-2022-0778-POC
[CVE-2022-0778: Exploring and exploiting CVE-2022-0778.]
GitHub: https://github.com/drago-96/CVE-2022-0778
[CVE-2022-0778: Proof of concept for CVE-2022-0778, which triggers an infinite loop in parsing X.509 ...]
GitHub: https://github.com/jkakavas/CVE-2022-0778-POC
[CVE-2022-0778]
GitHub: https://github.com/yywing/cve-2022-0778
[CVE-2022-0778]
GitHub: https://github.com/0xUhaw/CVE-2022-0778
[CVE-2022-0778: Proof of concept for CVE-2022-0778 in P12 and PEM format]

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-2022-0778
CVSS V2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C

CVSS Base Score:	5.0 (Medium)
Impact Subscore:	2.9
Exploitability Subscore:	10.0
CVSS Temporal Score:	3.7 (Low)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	3.7 (Low)

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

CVSS Base Score:	7.5 (High)
Impact Subscore:	3.6
Exploitability Subscore:	3.9
CVSS Temporal Score:	6.5 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.5 (Medium)

STIG Severity [?]: I
STIG Risk Rating: High

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Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

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

if (description)
{
  script_id(158973);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/23");

  script_cve_id("CVE-2022-0778");
  script_xref(name:"IAVA", value:"2022-A-0121");

  script_name(english:"OpenSSL 1.0.2 < 1.0.2zd Vulnerability");

  script_set_attribute(attribute:"synopsis", value:
"The remote service is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of OpenSSL installed on the remote host is prior to 1.0.2zd. It is, therefore, affected by a vulnerability
as referenced in the 1.0.2zd advisory.

  - The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop
    forever for non-prime moduli. Internally this function is used when parsing certificates that contain
    elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point
    encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has
    invalid explicit curve parameters. Since certificate parsing happens prior to verification of the
    certificate signature, any process that parses an externally supplied certificate may thus be subject to a
    denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they
    can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients
    consuming server certificates - TLS servers consuming client certificates - Hosting providers taking
    certificates or private keys from customers - Certificate authorities parsing certification requests from
    subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that
    use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS
    issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate
    which makes it slightly harder to trigger the infinite loop. However any operation which requires the
    public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-
    signed certificate to trigger the loop during verification of the certificate signature. This issue
    affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the
    15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected
    1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc). (CVE-2022-0778)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://cve.org/CVERecord?id=CVE-2022-0778");
  # https://github.com/openssl/openssl/commit/380085481c64de749a6dd25cdf0bcf4360b30f83
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?79cf103a");
  script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20220315.txt");
  script_set_attribute(attribute:"solution", value:
"Upgrade to OpenSSL version 1.0.2zd or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/S:U/C:N/I:N/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-2022-0778");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/03/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/03/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/16");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:openssl:openssl");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("openssl_version.nasl");
  script_require_keys("openssl/port");

  exit(0);
}

include('openssl_version.inc');

openssl_check_version(fixed:'1.0.2zd', min:'1.0.2', severity:SECURITY_WARNING);

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/openssl_1_0_2zd.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\openssl_1_0_2zd.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/openssl_1_0_2zd.nasl

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How to Run

Here is how to run the OpenSSL 1.0.2 < 1.0.2zd Vulnerability 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 Web Servers plugin family.
On the right side table select OpenSSL 1.0.2 < 1.0.2zd Vulnerability plugin ID 158973.
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 openssl_1_0_2zd.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a openssl_1_0_2zd.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - openssl_1_0_2zd.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 openssl_1_0_2zd.nasl -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:

2022-A-0121

See also:

Similar and related Nessus plugins:

158937 - Ubuntu 16.04 LTS : OpenSSL vulnerability (USN-5328-2)
158940 - Ubuntu 18.04 LTS / 21.10 : OpenSSL vulnerability (USN-5328-1)
158954 - Amazon Linux 2 : openssl, openssl11 (ALAS-2022-1766)
158958 - SUSE SLES12 Security Update : compat-openssl098 (SUSE-SU-2022:0859-1)
158960 - SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2022:0851-1)
158964 - SUSE SLES15 Security Update : openssl-1_0_0 (SUSE-SU-2022:0856-1)
158967 - SUSE SLES12 Security Update : openssl (SUSE-SU-2022:0854-1)
158969 - SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2022:0853-1)
158974 - OpenSSL 1.1.1 < 1.1.1n Vulnerability
158975 - OpenSSL 3.0.0 < 3.0.2 Vulnerability
158979 - Debian DSA-5103-1 : openssl - security update
158986 - Amazon Linux AMI : openssl (ALAS-2022-1575)
158990 - FreeBSD : OpenSSL -- Infinite loop in BN_mod_sqrt parsing certificates (ea05c456-a4fd-11ec-90de-1c697aa5a594)
159001 - Debian DLA-2953-1 : openssl1.0 - LTS security update
159002 - Debian DLA-2952-1 : openssl - LTS security update
159013 - SUSE SLES12 Security Update : openssl-1_1 (SUSE-SU-2022:0860-1)
159023 - SUSE SLES11 Security Update : openssl1 (SUSE-SU-2022:14916-1)
159027 - SUSE SLES12 Security Update : openssl-1_0_0 (SUSE-SU-2022:0857-1)
159032 - SUSE SLES11 Security Update : openssl (SUSE-SU-2022:14915-1)
159036 - openSUSE 15 Security Update : openssl-1_0_0 (openSUSE-SU-2022:0856-1)
159055 - Slackware Linux 14.2 / 15.0 / current openssl Vulnerability (SSA:2022-076-02)
159066 - Oracle Linux 7 : openssl (ELSA-2022-9224)
159067 - Oracle Linux 7 : openssl (ELSA-2022-9225)
159071 - Oracle Linux 7 : openssl (ELSA-2022-9237)
159139 - F5 Networks BIG-IP : OpenSSL vulnerability (K31323265)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file openssl_1_0_2zd.nasl version 1.4. For more plugins, visit the Nessus Plugin Library.

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OpenSSL 1.0.2 < 1.0.2zd Vulnerability - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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