EulerOS Virtualization 3.0.2.2 : openssl (EulerOS-SA-2021-2154)

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

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

if (description)
{
  script_id(151385);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/11");

  script_cve_id("CVE-2020-1971", "CVE-2021-23840", "CVE-2021-23841");
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"EulerOS Virtualization 3.0.2.2 : openssl (EulerOS-SA-2021-2154)");

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

  - The X.509 GeneralName type is a generic type for
    representing different types of names. One of those
    name types is known as EDIPartyName. OpenSSL provides a
    function GENERAL_NAME_cmp which compares different
    instances of a GENERAL_NAME to see if they are equal or
    not. This function behaves incorrectly when both
    GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer
    dereference and a crash may occur leading to a possible
    denial of service attack. OpenSSL itself uses the
    GENERAL_NAME_cmp function for two purposes: 1)
    Comparing CRL distribution point names between an
    available CRL and a CRL distribution point embedded in
    an X509 certificate 2) When verifying that a timestamp
    response token signer matches the timestamp authority
    name (exposed via the API functions
    TS_RESP_verify_response and TS_RESP_verify_token) If an
    attacker can control both items being compared then
    that attacker could trigger a crash. For example if the
    attacker can trick a client or server into checking a
    malicious certificate against a malicious CRL then this
    may occur. Note that some applications automatically
    download CRLs based on a URL embedded in a certificate.
    This checking happens prior to the signatures on the
    certificate and CRL being verified. OpenSSL's s_server,
    s_client and verify tools have support for the
    '-crl_download' option which implements automatic CRL
    downloading and this attack has been demonstrated to
    work against those tools. Note that an unrelated bug
    means that affected versions of OpenSSL cannot parse or
    construct correct encodings of EDIPARTYNAME. However it
    is possible to construct a malformed EDIPARTYNAME that
    OpenSSL's parser will accept and hence trigger this
    attack. All OpenSSL 1.1.1 and 1.0.2 versions are
    affected by this issue. Other OpenSSL releases are out
    of support and have not been checked. Fixed in OpenSSL
    1.1.1i (Affected 1.1.1-1.1.1h). Fixed in OpenSSL 1.0.2x
    (Affected 1.0.2-1.0.2w).(CVE-2020-1971)

  - Calls to EVP_CipherUpdate, EVP_EncryptUpdate and
    EVP_DecryptUpdate may overflow the output length
    argument in some cases where the input length is close
    to the maximum permissable length for an integer on the
    platform. In such cases the return value from the
    function call will be 1 (indicating success), but the
    output length value will be negative. This could cause
    applications to behave incorrectly or crash. OpenSSL
    versions 1.1.1i and below are affected by this issue.
    Users of these versions should upgrade to OpenSSL
    1.1.1j. OpenSSL versions 1.0.2x and below are affected
    by this issue. However OpenSSL 1.0.2 is out of support
    and no longer receiving public updates. Premium support
    customers of OpenSSL 1.0.2 should upgrade to 1.0.2y.
    Other users should upgrade to 1.1.1j. Fixed in OpenSSL
    1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y
    (Affected 1.0.2-1.0.2x).(CVE-2021-23840)

  - The OpenSSL public API function
    X509_issuer_and_serial_hash() attempts to create a
    unique hash value based on the issuer and serial number
    data contained within an X509 certificate. However it
    fails to correctly handle any errors that may occur
    while parsing the issuer field (which might occur if
    the issuer field is maliciously constructed). This may
    subsequently result in a NULL pointer deref and a crash
    leading to a potential denial of service attack. The
    function X509_issuer_and_serial_hash() is never
    directly called by OpenSSL itself so applications are
    only vulnerable if they use this function directly and
    they use it on certificates that may have been obtained
    from untrusted sources. OpenSSL versions 1.1.1i and
    below are affected by this issue. Users of these
    versions should upgrade to OpenSSL 1.1.1j. OpenSSL
    versions 1.0.2x and below are affected by this issue.
    However OpenSSL 1.0.2 is out of support and no longer
    receiving public updates. Premium support customers of
    OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users
    should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j
    (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y
    (Affected 1.0.2-1.0.2x).(CVE-2021-23841)

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-2021-2154
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1214fa9a");
  script_set_attribute(attribute:"solution", value:
"Update the affected openssl 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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-23840");

  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:"2021/07/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/07/06");

  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:"cpe:/o:huawei:euleros:uvp:3.0.2.2");
  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 != "3.0.2.2") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.2.2");
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-1.0.2k-16.h13.eulerosv2r7",
        "openssl-libs-1.0.2k-16.h13.eulerosv2r7"];

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");
}