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nessusThis script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.EULEROS_SA-2021-1960.NASL
HistoryJun 04, 2021 - 12:00 a.m.

EulerOS Virtualization 2.9.1 : openssl (EulerOS-SA-2021-1960)

2021-06-0400:00:00
This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
16

7 High

AI Score

Confidence

High

According to the version of the openssl packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerability :

  • An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).(CVE-2021-3449)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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

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

if (description)
{
  script_id(150247);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/27");

  script_cve_id("CVE-2021-3449");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"EulerOS Virtualization 2.9.1 : openssl (EulerOS-SA-2021-1960)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to the version of the openssl packages installed, the
EulerOS Virtualization installation on the remote host is affected by
the following vulnerability :

  - An OpenSSL TLS server may crash if sent a maliciously
    crafted renegotiation ClientHello message from a
    client. If a TLSv1.2 renegotiation ClientHello omits
    the signature_algorithms extension (where it was
    present in the initial ClientHello), but includes a
    signature_algorithms_cert extension then a NULL pointer
    dereference will result, leading to a crash and a
    denial of service attack. A server is only vulnerable
    if it has TLSv1.2 and renegotiation enabled (which is
    the default configuration). OpenSSL TLS clients are not
    impacted by this issue. All OpenSSL 1.1.1 versions are
    affected by this issue. Users of these versions should
    upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not
    impacted by this issue. Fixed in OpenSSL 1.1.1k
    (Affected 1.1.1-1.1.1j).(CVE-2021-3449)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-1960
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7b3bc934");
  script_set_attribute(attribute:"solution", value:
"Update the affected openssl package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3449");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssl-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.9.1");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  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);

release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "2.9.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.9.1");
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["openssl-1.1.1f-7.h14.eulerosv2r9",
        "openssl-libs-1.1.1f-7.h14.eulerosv2r9",
        "openssl-perl-1.1.1f-7.h14.eulerosv2r9"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openssl");
}

7 High

AI Score

Confidence

High

Related for EULEROS_SA-2021-1960.NASL