Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : curl vulnerabilities (USN-8932-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8932-1. 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(367206);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/19");
  script_xref(name:"USN", value:"8932-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : curl vulnerabilities (USN-8932-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that
are affected by a vulnerability as referenced in the USN-8932-1 advisory.

    Stanislav Fort discovered that curl did not properly clear AWS SigV4 authentication state when
    CURLOPT_AWS_SIGV4 was set to NULL. An attacker could possibly use this issue to obtain sensitive
    information. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2026-86409)

    Stanislav Fort discovered that an HTTP proxy could trick libcurl into sending credentials to the proxy
    itself by responding to a CONNECT request with an unexpected authentication challenge. An attacker could
    possibly use this issue to obtain sensitive information. (CVE-2026-86414)

    Stanislav Fort discovered that curl did not correctly handle HSTS entries when an includeSubDomains parent
    entry was imported before a longer-lived child entry. An attacker could possibly use this issue to cause
    curl to use unencrypted HTTP connections. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS.
    (CVE-2026-87862)

    Stanislav Fort discovered that curl did not properly handle HSTS max-age values that exceeded calendar
    time structure bounds. An attacker could possibly use this issue to cause a denial of service or data
    loss. This issue only affected Ubuntu 24.04 LTS. (CVE-2026-87863)

    Stanislav Fort discovered that curl did not properly handle IMAP APPEND commands when CURLOPT_CRLF was
    enabled, allowing overflow bytes to be interpreted as pipelined commands. An authenticated attacker could
    possibly use this issue to inject arbitrary IMAP commands. (CVE-2026-87864)

    Joshua Rogers discovered that libcurl had a use-after-free vulnerability in the FTP wildcard matching
    code. An attacker could possibly use this issue to cause curl to crash, resulting in a denial of service,
    or execute arbitrary code. (CVE-2026-92388)

    Joshua Rogers discovered that libcurl's TFTP state machine did not properly validate transfer directions,
    allowing a malicious server to force the client into transmit mode. An attacker could possibly use this
    issue to obtain sensitive information. (CVE-2026-92389)

    Joshua Rogers discovered that curl had a stack overflow vulnerability when processing deeply nested MIME
    structures. An attacker could possibly use this issue to cause curl to crash, resulting in a denial of
    service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 24.04
    LTS. (CVE-2026-92391)

    Joshua Rogers discovered that libcurl could expose credentials in the URL returned by
    CURLINFO_EFFECTIVE_URL when credentials were retrieved from a .netrc file. An attacker could possibly use
    this issue to obtain sensitive information. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS
    and Ubuntu 24.04 LTS. (CVE-2026-94266)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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://ubuntu.com/security/notices/USN-8932-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"Medium");

  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:"2026/10/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  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:24.04:-:lts");
  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");
  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:libcurl3t64-gnutls");
  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:libcurl4t64");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.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 (! ('14.04' >< os_release || '16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04 / 20.04 / 22.04 / 24.04', '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': '14.04', 'pkgname': 'curl', 'pkgver': '7.35.0-1ubuntu2.20+esm24', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '14.04', 'pkgname': 'libcurl3', 'pkgver': '7.35.0-1ubuntu2.20+esm24', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '14.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.35.0-1ubuntu2.20+esm24', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '14.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.35.0-1ubuntu2.20+esm24', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '16.04', 'pkgname': 'curl', 'pkgver': '7.47.0-1ubuntu2.19+esm21', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '16.04', 'pkgname': 'libcurl3', 'pkgver': '7.47.0-1ubuntu2.19+esm21', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '16.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.47.0-1ubuntu2.19+esm21', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '16.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.47.0-1ubuntu2.19+esm21', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389']},
    {'osver': '18.04', 'pkgname': 'curl', 'pkgver': '7.58.0-2ubuntu3.24+esm15', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391']},
    {'osver': '18.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.58.0-2ubuntu3.24+esm15', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391']},
    {'osver': '18.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.58.0-2ubuntu3.24+esm15', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391']},
    {'osver': '18.04', 'pkgname': 'libcurl4', 'pkgver': '7.58.0-2ubuntu3.24+esm15', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391']},
    {'osver': '20.04', 'pkgname': 'curl', 'pkgver': '7.68.0-1ubuntu2.25+esm10', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '20.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.68.0-1ubuntu2.25+esm10', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '20.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.68.0-1ubuntu2.25+esm10', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '20.04', 'pkgname': 'libcurl4', 'pkgver': '7.68.0-1ubuntu2.25+esm10', 'cves': ['CVE-2026-86414', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '22.04', 'pkgname': 'curl', 'pkgver': '7.81.0-1ubuntu1.30', 'cves': ['CVE-2026-86409', 'CVE-2026-86414', 'CVE-2026-87862', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '22.04', 'pkgname': 'libcurl3-gnutls', 'pkgver': '7.81.0-1ubuntu1.30', 'cves': ['CVE-2026-86409', 'CVE-2026-86414', 'CVE-2026-87862', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '22.04', 'pkgname': 'libcurl3-nss', 'pkgver': '7.81.0-1ubuntu1.30', 'cves': ['CVE-2026-86409', 'CVE-2026-86414', 'CVE-2026-87862', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '22.04', 'pkgname': 'libcurl4', 'pkgver': '7.81.0-1ubuntu1.30', 'cves': ['CVE-2026-86409', 'CVE-2026-86414', 'CVE-2026-87862', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '24.04', 'pkgname': 'curl', 'pkgver': '8.5.0-2ubuntu10.16', 'cves': ['CVE-2026-86409', 'CVE-2026-86414', 'CVE-2026-87862', 'CVE-2026-87863', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '24.04', 'pkgname': 'libcurl3t64-gnutls', 'pkgver': '8.5.0-2ubuntu10.16', 'cves': ['CVE-2026-86409', 'CVE-2026-86414', 'CVE-2026-87862', 'CVE-2026-87863', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']},
    {'osver': '24.04', 'pkgname': 'libcurl4t64', 'pkgver': '8.5.0-2ubuntu10.16', 'cves': ['CVE-2026-86409', 'CVE-2026-86414', 'CVE-2026-87862', 'CVE-2026-87863', 'CVE-2026-87864', 'CVE-2026-92388', 'CVE-2026-92389', 'CVE-2026-92391', 'CVE-2026-94266']}
];

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 (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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 / libcurl3-gnutls / libcurl3-nss / etc');
}