The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6473-1 advisory.
urllib3 before 1.24.2 does not remove the authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the authorization header to be exposed to unintended hosts or transmitted in cleartext. NOTE: this issue exists because of an incomplete fix for CVE-2018-20060 (which was case-sensitive). (CVE-2018-25091)
urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn’t treat the Cookie
HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user.
However, it is possible for a user to specify a Cookie
header and unknowingly leak information via HTTP redirects to a different origin if that user doesn’t disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5. (CVE-2023-43804)
urllib3 is a user-friendly HTTP client library for Python. urllib3 previously wouldn’t remove the HTTP request body when an HTTP redirect response using status 301, 302, or 303 after the request had its method changed from one that could accept a request body (like POST
) to GET
as is required by HTTP RFCs.
Although this behavior is not specified in the section for redirects, it can be inferred by piecing together information from different sections and we have observed the behavior in other major HTTP client implementations like curl and web browsers. Because the vulnerability requires a previously trusted service to become compromised in order to have an impact on confidentiality we believe the exploitability of this vulnerability is low. Additionally, many users aren’t putting sensitive data in HTTP request bodies, if this is the case then this vulnerability isn’t exploitable. Both of the following conditions must be true to be affected by this vulnerability: 1. Using urllib3 and submitting sensitive information in the HTTP request body (such as form data or JSON) and 2. The origin service is compromised and starts redirecting using 301, 302, or 303 to a malicious peer or the redirected-to service becomes compromised.
This issue has been addressed in versions 1.26.18 and 2.0.7 and users are advised to update to resolve this issue. Users unable to update should disable redirects for services that aren’t expecting to respond with redirects with redirects=False
and disable automatic redirects with redirects=False
and handle 301, 302, and 303 redirects manually by stripping the HTTP request body. (CVE-2023-45803)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6473-1. 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(185342);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/07");
script_cve_id("CVE-2018-25091", "CVE-2023-43804", "CVE-2023-45803");
script_xref(name:"USN", value:"6473-1");
script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : urllib3 vulnerabilities (USN-6473-1)");
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 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are
affected by multiple vulnerabilities as referenced in the USN-6473-1 advisory.
- urllib3 before 1.24.2 does not remove the authorization HTTP header when following a cross-origin redirect
(i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the
authorization header to be exposed to unintended hosts or transmitted in cleartext. NOTE: this issue
exists because of an incomplete fix for CVE-2018-20060 (which was case-sensitive). (CVE-2018-25091)
- urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header
special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user.
However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP
redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been
patched in urllib3 version 1.26.17 or 2.0.5. (CVE-2023-43804)
- urllib3 is a user-friendly HTTP client library for Python. urllib3 previously wouldn't remove the HTTP
request body when an HTTP redirect response using status 301, 302, or 303 after the request had its method
changed from one that could accept a request body (like `POST`) to `GET` as is required by HTTP RFCs.
Although this behavior is not specified in the section for redirects, it can be inferred by piecing
together information from different sections and we have observed the behavior in other major HTTP client
implementations like curl and web browsers. Because the vulnerability requires a previously trusted
service to become compromised in order to have an impact on confidentiality we believe the exploitability
of this vulnerability is low. Additionally, many users aren't putting sensitive data in HTTP request
bodies, if this is the case then this vulnerability isn't exploitable. Both of the following conditions
must be true to be affected by this vulnerability: 1. Using urllib3 and submitting sensitive information
in the HTTP request body (such as form data or JSON) and 2. The origin service is compromised and starts
redirecting using 301, 302, or 303 to a malicious peer or the redirected-to service becomes compromised.
This issue has been addressed in versions 1.26.18 and 2.0.7 and users are advised to update to resolve
this issue. Users unable to update should disable redirects for services that aren't expecting to respond
with redirects with `redirects=False` and disable automatic redirects with `redirects=False` and handle
301, 302, and 303 redirects manually by stripping the HTTP request body. (CVE-2023-45803)
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-6473-1");
script_set_attribute(attribute:"solution", value:
"Update the affected python-urllib3 and / or python3-urllib3 packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-43804");
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:"2023/10/02");
script_set_attribute(attribute:"patch_publication_date", value:"2023/11/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/07");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
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:"cpe:/o:canonical:ubuntu_linux:23.10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-urllib3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-urllib3");
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) 2023 Canonical, Inc. / NASL script (C) 2023 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release || '23.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04 / 23.04 / 23.10', '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': '16.04', 'pkgname': 'python-urllib3', 'pkgver': '1.13.1-2ubuntu0.16.04.4+esm1'},
{'osver': '16.04', 'pkgname': 'python3-urllib3', 'pkgver': '1.13.1-2ubuntu0.16.04.4+esm1'},
{'osver': '18.04', 'pkgname': 'python-urllib3', 'pkgver': '1.22-1ubuntu0.18.04.2+esm1'},
{'osver': '18.04', 'pkgname': 'python3-urllib3', 'pkgver': '1.22-1ubuntu0.18.04.2+esm1'},
{'osver': '20.04', 'pkgname': 'python3-urllib3', 'pkgver': '1.25.8-2ubuntu0.3'},
{'osver': '22.04', 'pkgname': 'python3-urllib3', 'pkgver': '1.26.5-1~exp1ubuntu0.1'},
{'osver': '23.04', 'pkgname': 'python3-urllib3', 'pkgver': '1.26.12-1ubuntu0.1'},
{'osver': '23.10', 'pkgname': 'python3-urllib3', 'pkgver': '1.26.16-1ubuntu0.1'}
];
var flag = 0;
foreach 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)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : ubuntu_report_get()
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'python-urllib3 / python3-urllib3');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 20.04 | cpe:/o:canonical:ubuntu_linux:20.04:-:lts |
canonical | ubuntu_linux | python-urllib3 | p-cpe:/a:canonical:ubuntu_linux:python-urllib3 |
canonical | ubuntu_linux | python3-urllib3 | p-cpe:/a:canonical:ubuntu_linux:python3-urllib3 |
canonical | ubuntu_linux | 22.04 | cpe:/o:canonical:ubuntu_linux:22.04:-:lts |
canonical | ubuntu_linux | 16.04 | cpe:/o:canonical:ubuntu_linux:16.04:-:esm |
canonical | ubuntu_linux | 18.04 | cpe:/o:canonical:ubuntu_linux:18.04:-:esm |
canonical | ubuntu_linux | 23.04 | cpe:/o:canonical:ubuntu_linux:23.04 |
canonical | ubuntu_linux | 23.10 | cpe:/o:canonical:ubuntu_linux:23.10 |