5.4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
0.001 Low
EPSS
Percentile
48.1%
The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-56760afca8 advisory.
Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the url_preview_url_blacklist
setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the url_preview_ip_range_blacklist
setting (by default this only allows public IPs) and by the limited information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image response is discarded. Systems which have URL preview disabled (via the url_preview_enabled
setting) or have not configured a url_preview_url_blacklist
are not affected. This issue has been addressed in version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.
(CVE-2023-32683)
Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions it may be possible for a deactivated user to login when using uncommon configurations. This only applies if any of the following are true: 1. JSON Web Tokens are enabled for login via the jwt_config.enabled
configuration setting. 2. The local password database is enabled via the password_config.enabled
and password_config.localdb_enabled
configuration settings and a user’s password is updated via an admin API after a user is deactivated. Note that the local password database is enabled by default, but it is uncommon to set a user’s password after they’ve been deactivated. Installations that are configured to only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external password provider (e.g. LDAP) are not affected. If not using JSON Web Tokens, ensure that deactivated users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to upgrade. (CVE-2023-32682)
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 Fedora Security Advisory FEDORA-2023-56760afca8
#
include('compat.inc');
if (description)
{
script_id(177402);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/06/16");
script_cve_id("CVE-2023-32682", "CVE-2023-32683");
script_xref(name:"FEDORA", value:"2023-56760afca8");
script_name(english:"Fedora 38 : matrix-synapse (2023-56760afca8)");
script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the
FEDORA-2023-56760afca8 advisory.
- Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed
or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request
forgery or bypassing network policies. Impact is limited to IP addresses allowed by the
`url_preview_ip_range_blacklist` setting (by default this only allows public IPs) and by the limited
information returned to the client: 1. For discovered oEmbed URLs, any non-JSON response or a JSON
response which includes non-oEmbed information is discarded. 2. For discovered image URLs, any non-image
response is discarded. Systems which have URL preview disabled (via the `url_preview_enabled` setting) or
have not configured a `url_preview_url_blacklist` are not affected. This issue has been addressed in
version 1.85.0. Users are advised to upgrade. User unable to upgrade may also disable URL previews.
(CVE-2023-32683)
- Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. In affected versions
it may be possible for a deactivated user to login when using uncommon configurations. This only applies
if any of the following are true: 1. JSON Web Tokens are enabled for login via the `jwt_config.enabled`
configuration setting. 2. The local password database is enabled via the `password_config.enabled` and
`password_config.localdb_enabled` configuration settings *and* a user's password is updated via an admin
API after a user is deactivated. Note that the local password database is enabled by default, but it is
uncommon to set a user's password after they've been deactivated. Installations that are configured to
only allow login via Single Sign-On (SSO) via CAS, SAML or OpenID Connect (OIDC); or via an external
password provider (e.g. LDAP) are not affected. If not using JSON Web Tokens, ensure that deactivated
users do not have a password set. This issue has been addressed in version 1.85.0. Users are advised to
upgrade. (CVE-2023-32682)
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://bodhi.fedoraproject.org/updates/FEDORA-2023-56760afca8");
script_set_attribute(attribute:"solution", value:
"Update the affected matrix-synapse package.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/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:L/I:L/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-2023-32683");
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:"2023/06/06");
script_set_attribute(attribute:"patch_publication_date", value:"2023/06/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/06/16");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:38");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:matrix-synapse");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Fedora Local Security Checks");
script_copyright(english:"This script is Copyright (C) 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/RedHat/release", "Host/RedHat/rpm-list");
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/RedHat/release');
if (isnull(os_release) || 'Fedora' >!< os_release) audit(AUDIT_OS_NOT, 'Fedora');
var os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Fedora');
os_ver = os_ver[1];
if (! preg(pattern:"^38([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Fedora 38', 'Fedora ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Fedora', cpu);
var pkgs = [
{'reference':'matrix-synapse-1.85.2-1.fc38', 'release':'FC38', 'rpm_spec_vers_cmp':TRUE}
];
var flag = 0;
foreach 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;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 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 (reference && _release) {
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)) 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, 'matrix-synapse');
}
Vendor | Product | Version | CPE |
---|---|---|---|
fedoraproject | fedora | 38 | cpe:/o:fedoraproject:fedora:38 |
fedoraproject | fedora | matrix-synapse | p-cpe:/a:fedoraproject:fedora:matrix-synapse |