Alibaba Cloud Linux 3 : 0025: openssl (ALINUX3-SA-2022:0025)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Alibaba Cloud Linux Security Advisory ALINUX3-SA-2022:0025.
##

include('compat.inc');

if (description)
{
  script_id(236517);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/05/14");

  script_cve_id(
    "CVE-2019-1543",
    "CVE-2019-1547",
    "CVE-2019-1549",
    "CVE-2019-1563",
    "CVE-2021-3712",
    "CVE-2022-0778"
  );

  script_name(english:"Alibaba Cloud Linux 3 : 0025: openssl (ALINUX3-SA-2022:0025)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Alibaba Cloud Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced
in the ALINUX3-SA-2022:0025 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2019-1543:
    ChaCha20-Poly1305 is an AEAD cipher, and requires a unique nonce input for every encryption operation. RFC
    7539 specifies that the nonce value (IV) should be 96 bits (12 bytes). OpenSSL allows a variable nonce
    length and front pads the nonce with 0 bytes if it is less than 12 bytes. However it also incorrectly
    allows a nonce to be set of up to 16 bytes. In this case only the last 12 bytes are significant and any
    additional leading bytes are ignored. It is a requirement of using this cipher that nonce values are
    unique. Messages encrypted using a reused nonce value are susceptible to serious confidentiality and
    integrity attacks. If an application changes the default nonce length to be longer than 12 bytes and then
    makes a change to the leading bytes of the nonce expecting the new value to be a new unique nonce then
    such an application could inadvertently encrypt messages with a reused nonce. Additionally the ignored
    bytes in a long nonce are not covered by the integrity guarantee of this cipher. Any application that
    relies on the integrity of these ignored leading bytes of a long nonce may be further affected. Any
    OpenSSL internal use of this cipher, including in SSL/TLS, is safe because no such use sets such a long
    nonce value. However user applications that use this cipher directly and set a non-default nonce length to
    be longer than 12 bytes may be vulnerable. OpenSSL versions 1.1.1 and 1.1.0 are affected by this issue.
    Due to the limited scope of affected deployments this has been assessed as low severity and therefore we
    are not creating new releases at this time. Fixed in OpenSSL 1.1.1c (Affected 1.1.1-1.1.1b). Fixed in
    OpenSSL 1.1.0k (Affected 1.1.0-1.1.0j).

    CVE-2019-1547:
    Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant
    code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead
    of using a named curve). In those cases it is possible that such a group does not have the cofactor
    present. This can occur even where all the parameters match a known named curve. If such a curve is used
    then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery
    during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability
    to time the creation of a large number of signatures where explicit parameters with no co-factor present
    are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because
    explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL
    1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

    CVE-2019-1549:
    OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include
    protection in the event of a fork() system call in order to ensure that the parent and child processes did
    not share the same RNG state. However this protection was not being used in the default case. A partial
    mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so
    the likelihood of a parent and child process sharing state is significantly reduced. If an application
    already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur
    at all. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).

    CVE-2019-1563:
    In situations where an attacker receives automated notification of the success or failure of a decryption
    attempt an attacker, after sending a very large number of messages to be decrypted, can recover a
    CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the
    public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a
    certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the
    correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL
    1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

    CVE-2021-3712:
    ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a
    buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings
    which are repesented as a buffer for the string data which is terminated with a NUL (0) byte. Although not
    a strict requirement, ASN.1 strings that are parsed using OpenSSL's own d2i functions (and other similar
    parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will
    additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for
    applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array
    by directly setting the data and length fields in the ASN1_STRING array. This can also happen by using
    the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to
    assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for
    strings that have been directly constructed. Where an application requests an ASN.1 structure to be
    printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the
    application without NUL terminating the data field, then a read buffer overrun can occur. The same thing
    can also occur during name constraints processing of certificates (for example if a certificate has been
    directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the
    certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the
    X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an
    application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL
    functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack).
    It could also result in the disclosure of private memory contents (such as private keys, or sensitive
    plaintext). Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected
    1.0.2-1.0.2y).

    CVE-2022-0778:
    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).

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"http://mirrors.aliyun.com/alinux/3/cve/alinux3-sa-20220025.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3712");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/04/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl-libs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:openssl-static");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alibabacloud:alibaba_cloud_linux_3");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Alibaba/release');
if (isnull(os_release) || 'Alibaba Cloud Linux' >!< os_release) audit(AUDIT_OS_NOT, 'Alibaba Cloud Linux');
var os_ver = pregmatch(pattern: "Alibaba Cloud Linux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Alibaba Cloud Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^3([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Alibaba Cloud Linux 3.x', 'Alibaba Cloud Linux ' + os_ver);

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

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Alibaba Cloud Linux', cpu);

var pkgs = [
    {'reference':'openssl-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-debuginfo-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-debuginfo-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-debugsource-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-debugsource-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-devel-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-devel-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-libs-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-libs-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-libs-debuginfo-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-libs-debuginfo-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-perl-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-perl-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-static-1.1.1k-5.0.2.al8', 'cpu':'aarch64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
    {'reference':'openssl-static-1.1.1k-5.0.2.al8', 'cpu':'x86_64', 'release':'3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'}
];

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;
  var cves = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = 'Alibaba Linux ' + 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 (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    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, cves:cves)) 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-debuginfo / openssl-debugsource / openssl-devel / etc');
}