Oracle Linux 7 : openssl (ELSA-2022-9249) - Nessus

High Plugin ID: 159359

This page contains detailed information about the Oracle Linux 7 : openssl (ELSA-2022-9249) 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: 159359
Name: Oracle Linux 7 : openssl (ELSA-2022-9249)
Filename: oraclelinux_ELSA-2022-9249.nasl
Vulnerability Published: 2022-03-15
This Plugin Published: 2022-03-31
Last Modification Time: 2022-03-31
Plugin Version: 1.2
Plugin Type: local
Plugin Family: Oracle Linux Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/local_checks_enabled, Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Severity: High
Vulnerability Published: 2022-03-15
Patch Published: 2022-03-30
CVE [?]: CVE-2022-0778
CPE [?]: cpe:/o:oracle:linux:7, p-cpe:/a:oracle:linux:openssl, p-cpe:/a:oracle:linux:openssl-devel, p-cpe:/a:oracle:linux:openssl-libs, p-cpe:/a:oracle:linux:openssl-perl, p-cpe:/a:oracle:linux:openssl-static

Synopsis

The remote Oracle Linux host is missing a security update.

Description

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-9249 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

Update the affected packages.

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 Oracle Linux 7 : openssl (ELSA-2022-9249) 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, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2022-9249.
##

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

if (description)
{
  script_id(159359);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/31");

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

  script_name(english:"Oracle Linux 7 : openssl (ELSA-2022-9249)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2022-9249 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://linux.oracle.com/errata/ELSA-2022-9249.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  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:"2022/03/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-static");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle Linux Local Security Checks");

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

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

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
var os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var pkgs = [
    {'reference':'openssl-1.0.2k-25.el7_9_fips', 'cpu':'aarch64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-1.0.2k-25.el7_9_fips', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-devel-1.0.2k-25.el7_9_fips', 'cpu':'aarch64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-devel-1.0.2k-25.el7_9_fips', 'cpu':'i686', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-devel-1.0.2k-25.el7_9_fips', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-libs-1.0.2k-25.el7_9_fips', 'cpu':'aarch64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-libs-1.0.2k-25.el7_9_fips', 'cpu':'i686', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-libs-1.0.2k-25.el7_9_fips', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-perl-1.0.2k-25.el7_9_fips', 'cpu':'aarch64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-perl-1.0.2k-25.el7_9_fips', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-static-1.0.2k-25.el7_9_fips', 'cpu':'aarch64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-static-1.0.2k-25.el7_9_fips', 'cpu':'i686', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'},
    {'reference':'openssl-static-1.0.2k-25.el7_9_fips', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_9_fips', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var sp = NULL;
  var cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = 'EL' + package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && release) {
    if (exists_check) {
        if (rpm_exists(release:release, rpm:exists_check) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    } else {
        if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    }
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'openssl / openssl-devel / openssl-libs / etc');
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/oraclelinux_ELSA-2022-9249.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\oraclelinux_ELSA-2022-9249.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/oraclelinux_ELSA-2022-9249.nasl

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How to Run

Here is how to run the Oracle Linux 7 : openssl (ELSA-2022-9249) 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 Oracle Linux Local Security Checks plugin family.
On the right side table select Oracle Linux 7 : openssl (ELSA-2022-9249) plugin ID 159359.
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 oraclelinux_ELSA-2022-9249.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a oraclelinux_ELSA-2022-9249.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - oraclelinux_ELSA-2022-9249.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 oraclelinux_ELSA-2022-9249.nasl -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:

2022-A-0121

See also:

Similar and related Nessus plugins:

159139 - F5 Networks BIG-IP : OpenSSL vulnerability (K31323265)
159173 - Oracle Linux 8 : openssl (ELSA-2022-9233)
159179 - SUSE SLES12 Security Update : nodejs12 (SUSE-SU-2022:0935-1)
159183 - Oracle Linux 8 : openssl (ELSA-2022-9243)
159187 - Oracle Linux 6 : openssl (ELSA-2022-9246)
159274 - RHEL 7 : openssl (RHSA-2022:1077)
159275 - RHEL 7 : openssl (RHSA-2022:1076)
159282 - RHEL 7 : openssl (RHSA-2022:1066)
159283 - RHEL 6 : openssl (RHSA-2022:1073)
159286 - RHEL 7 : openssl (RHSA-2022:1078)
159290 - RHEL 8 : openssl (RHSA-2022:1071)
159291 - RHEL 8 : openssl (RHSA-2022:1065)
159292 - RHEL 7 : openssl (RHSA-2022:1082)
159293 - Oracle Linux 7 : openssl (ELSA-2022-1066)
159294 - Oracle Linux 8 : openssl (ELSA-2022-1065)
159299 - RHEL 8 : openssl (RHSA-2022:1091)
159307 - CentOS 7 : openssl (CESA-2022:1066)
159362 - Palo Alto Networks PAN-OS 8.1.x < 8.1.23 / 9.0.x < 9.0.16-hf / 9.1.x < 9.1.13-hf / 10.0.x < 10.0.10 / 10.1.x < 10.1.5-hf / 10.2.x < 10.2.1 Vulnerability
159376 - Tenable Nessus 10.x < 10.1.2 / 8.x < 8.15.4 Third-Party Vulnerability (TNS-2022-06)
159378 - Tenable Nessus Agent < 8.3.3 / 10.x < 10.1.3 Third-Party Vulnerability (TNS-2022-07)
159381 - Oracle Linux 7 : openssl (ELSA-2022-9255)
159383 - Oracle Linux 8 : openssl (ELSA-2022-9258)
159399 - RHEL 8 : openssl (RHSA-2022:1112)
159595 - RHEL 7 : RHV-H security update (redhat-virtualization-host) 4.3.22 (Important) (RHSA-2022:1263)
159605 - Oracle Linux 6 : openssl (ELSA-2022-9272)
159611 - Rocky Linux 8 : openssl (RLSA-2022:1065)
159917 - Oracle MySQL Enterprise Monitor (Apr 2022 CPU)
159976 - Oracle MySQL Server (Apr 2022 CPU)
159977 - Oracle MySQL Server (Apr 2022 CPU)
160030 - RHEL 7 : Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP11 (RHSA-2022:1389)
160049 - Oracle MySQL Connectors (Apr 2022 CPU)
160088 - Oracle MySQL Workbench < 8.0.29 (Jan 2022)
160105 - EulerOS 2.0 SP5 : openssl111d (EulerOS-SA-2022-1547)
160110 - EulerOS 2.0 SP5 : openssl098e (EulerOS-SA-2022-1546)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file oraclelinux_ELSA-2022-9249.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

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Oracle Linux 7 : openssl (ELSA-2022-9249) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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