8.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
0.001 Low
EPSS
Percentile
47.8%
The remote Fedora 37 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2023-5435c10480 advisory.
curl
and httpie
(version 3.1.0 or later). At the file download stage, all cookies are passed by yt-dlp to the file downloader as a Cookie
header, thereby losing their scope. This also occurs in yt-dlp’s info JSON output, which may be used by external tools. As a result, the downloader or external tool may indiscriminately send cookies with requests to domains or paths for which the cookies are not scoped. yt-dlp version 2023.07.06 and nightly 2023.07.06.185519 fix this issue by removing the Cookie
header upon HTTP redirects; having native downloaders calculate the Cookie
header from the cookiejar, utilizing external downloaders’ built-in support for cookies instead of passing them as header arguments, disabling HTTP redirectiong if the external downloader does not have proper cookie support, processing cookies passed as HTTP headers to limit their scope, and having a separate field for cookies in the info dict storing more information about scoping Some workarounds are available for those who are unable to upgrade. Avoid using cookies and user authentication methods. While extractors may set custom cookies, these usually do not contain sensitive information. Alternatively, avoid using --load-info-json
. Or, if authentication is a must: verify the integrity of download links from unknown sources in browser (including redirects) before passing them to yt-dlp; use curl
as external downloader, since it is not impacted; and/or avoid fragmented formats such as HLS/m3u8, DASH/mpd and ISM.Note that Nessus has not tested for this issue 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-2023-5435c10480
#
include('compat.inc');
if (description)
{
script_id(180185);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/08/25");
script_cve_id("CVE-2023-35934");
script_xref(name:"FEDORA", value:"2023-5435c10480");
script_name(english:"Fedora 37 : youtube-dl (2023-5435c10480)");
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 37 host has a package installed that is affected by a vulnerability as referenced in the
FEDORA-2023-5435c10480 advisory.
- yt-dlp is a command-line program to download videos from video sites. During file downloads, yt-dlp or the
external downloaders that yt-dlp employs may leak cookies on HTTP redirects to a different host, or leak
them when the host for download fragments differs from their parent manifest's host. This vulnerable
behavior is present in yt-dlp prior to 2023.07.06 and nightly 2023.07.06.185519. All native and external
downloaders are affected, except for `curl` and `httpie` (version 3.1.0 or later). At the file download
stage, all cookies are passed by yt-dlp to the file downloader as a `Cookie` header, thereby losing their
scope. This also occurs in yt-dlp's info JSON output, which may be used by external tools. As a result,
the downloader or external tool may indiscriminately send cookies with requests to domains or paths for
which the cookies are not scoped. yt-dlp version 2023.07.06 and nightly 2023.07.06.185519 fix this issue
by removing the `Cookie` header upon HTTP redirects; having native downloaders calculate the `Cookie`
header from the cookiejar, utilizing external downloaders' built-in support for cookies instead of passing
them as header arguments, disabling HTTP redirectiong if the external downloader does not have proper
cookie support, processing cookies passed as HTTP headers to limit their scope, and having a separate
field for cookies in the info dict storing more information about scoping Some workarounds are available
for those who are unable to upgrade. Avoid using cookies and user authentication methods. While extractors
may set custom cookies, these usually do not contain sensitive information. Alternatively, avoid using
`--load-info-json`. Or, if authentication is a must: verify the integrity of download links from unknown
sources in browser (including redirects) before passing them to yt-dlp; use `curl` as external downloader,
since it is not impacted; and/or avoid fragmented formats such as HLS/m3u8, DASH/mpd and ISM.
(CVE-2023-35934)
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://bodhi.fedoraproject.org/updates/FEDORA-2023-5435c10480");
script_set_attribute(attribute:"solution", value:
"Update the affected youtube-dl package.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/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:N/UI:R/S:C/C:H/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-2023-35934");
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:"2023/07/06");
script_set_attribute(attribute:"patch_publication_date", value:"2023/08/16");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/25");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:37");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:youtube-dl");
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:"^37([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Fedora 37', 'Fedora ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Fedora', cpu);
var pkgs = [
{'reference':'youtube-dl-2023.07.30.git2efc8de-1.20230815git2efc8de.fc37', 'release':'FC37', '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_HOLE,
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, 'youtube-dl');
}
Vendor | Product | Version | CPE |
---|---|---|---|
fedoraproject | fedora | 37 | cpe:/o:fedoraproject:fedora:37 |
fedoraproject | fedora | youtube-dl | p-cpe:/a:fedoraproject:fedora:youtube-dl |