Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : curl vulnerabilities (USN-6429-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6429-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(182907);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/29");

  script_cve_id("CVE-2023-38545", "CVE-2023-38546");
  script_xref(name:"USN", value:"6429-1");
  script_xref(name:"CEA-ID", value:"CEA-2023-0052");
  script_xref(name:"IAVA", value:"2023-A-0531-S");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : curl vulnerabilities (USN-6429-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6429-1 advisory.

    Jay Satiro discovered that curl incorrectly handled hostnames when using a SOCKS5 proxy. In environments
    where curl is configured to use a SOCKS5 proxy, a remote attacker could possibly use this issue to execute
    arbitrary code. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-38545)

    It was discovered that curl incorrectly handled cookies when an application duplicated certain handles. A
    local attacker could possibly create a cookie file and inject arbitrary cookies into subsequent
    connections. (CVE-2023-38546)

Tenable has extracted the preceding description block directly from the Ubuntu 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:"https://ubuntu.com/security/notices/USN-6429-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2023-38545");

  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:"2023/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/10/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcurl3-gnutls");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcurl3-nss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcurl4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcurl4-gnutls-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcurl4-nss-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libcurl4-openssl-dev");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2023-2024 Canonical, Inc. / NASL script (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 23.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '20.04', 'pkgname': 'curl', 'pkgver': '7.68.0-1ubuntu2.20'},
    {'osver': '20.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.68.0-1ubuntu2.20'},
    {'osver': '20.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.68.0-1ubuntu2.20'},
    {'osver': '20.04', 'pkgname': 'libcurl4', 'pkgver': '7.68.0-1ubuntu2.20'},
    {'osver': '20.04', 'pkgname': 'libcurl4-gnutls-dev', 'pkgver': '7.68.0-1ubuntu2.20'},
    {'osver': '20.04', 'pkgname': 'libcurl4-nss-dev', 'pkgver': '7.68.0-1ubuntu2.20'},
    {'osver': '20.04', 'pkgname': 'libcurl4-openssl-dev', 'pkgver': '7.68.0-1ubuntu2.20'},
    {'osver': '22.04', 'pkgname': 'curl', 'pkgver': '7.81.0-1ubuntu1.14'},
    {'osver': '22.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.81.0-1ubuntu1.14'},
    {'osver': '22.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.81.0-1ubuntu1.14'},
    {'osver': '22.04', 'pkgname': 'libcurl4', 'pkgver': '7.81.0-1ubuntu1.14'},
    {'osver': '22.04', 'pkgname': 'libcurl4-gnutls-dev', 'pkgver': '7.81.0-1ubuntu1.14'},
    {'osver': '22.04', 'pkgname': 'libcurl4-nss-dev', 'pkgver': '7.81.0-1ubuntu1.14'},
    {'osver': '22.04', 'pkgname': 'libcurl4-openssl-dev', 'pkgver': '7.81.0-1ubuntu1.14'},
    {'osver': '23.04', 'pkgname': 'curl', 'pkgver': '7.88.1-8ubuntu2.3'},
    {'osver': '23.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.88.1-8ubuntu2.3'},
    {'osver': '23.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.88.1-8ubuntu2.3'},
    {'osver': '23.04', 'pkgname': 'libcurl4', 'pkgver': '7.88.1-8ubuntu2.3'},
    {'osver': '23.04', 'pkgname': 'libcurl4-gnutls-dev', 'pkgver': '7.88.1-8ubuntu2.3'},
    {'osver': '23.04', 'pkgname': 'libcurl4-nss-dev', 'pkgver': '7.88.1-8ubuntu2.3'},
    {'osver': '23.04', 'pkgname': 'libcurl4-openssl-dev', 'pkgver': '7.88.1-8ubuntu2.3'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'curl / libcurl3-gnutls / libcurl3-nss / libcurl4 / etc');
}