CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
84.5%
The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 78.8. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2021-09 advisory.
As specified in the W3C Content Security Policy draft, when creating a violation report, User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If thats not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage. Under certain types of redirects, Thunderbird incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination’s origin. (CVE-2021-23969)
If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. (CVE-2021-23968)
When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. (CVE-2021-23973)
Mozilla developers Alexis Beingessner, Tyson Smith, Nika Layzell, and Mats Palmgren reported memory safety bugs present in Thunderbird 78.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2021-23978)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Mozilla Foundation Security Advisory mfsa2021-09.
# The text itself is copyright (C) Mozilla Foundation.
##
include('compat.inc');
if (description)
{
script_id(146784);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/05");
script_cve_id(
"CVE-2021-23968",
"CVE-2021-23969",
"CVE-2021-23973",
"CVE-2021-23978"
);
script_name(english:"Mozilla Thunderbird < 78.8");
script_set_attribute(attribute:"synopsis", value:
"A mail client installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 78.8. It is, therefore, affected
by multiple vulnerabilities as referenced in the mfsa2021-09 advisory.
- As specified in the W3C Content Security Policy draft, when creating a violation report, User agents need
to ensure that the source file is the URL requested by the page, pre-redirects. If thats not possible,
user agents need to strip the URL down to an origin to avoid unintentional leakage. Under certain types
of redirects, Thunderbird incorrectly set the source file to be the destination of the redirects. This was
fixed to be the redirect destination's origin. (CVE-2021-23969)
- If Content Security Policy blocked frame navigation, the full destination of a redirect served in the
frame was reported in the violation report; as opposed to the original frame URI. This could be used to
leak sensitive information contained in such URIs. (CVE-2021-23968)
- When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted,
and the content of that error may have revealed information about the resource. (CVE-2021-23973)
- Mozilla developers Alexis Beingessner, Tyson Smith, Nika Layzell, and Mats Palmgren reported memory safety
bugs present in Thunderbird 78.7. Some of these bugs showed evidence of memory corruption and we presume
that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2021-23978)
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://www.mozilla.org/en-US/security/advisories/mfsa2021-09/");
script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Thunderbird version 78.8 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
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:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-23978");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/23");
script_set_attribute(attribute:"patch_publication_date", value:"2021/02/23");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/23");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:thunderbird");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"MacOS X Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("macosx_thunderbird_installed.nasl");
script_require_keys("MacOSX/Thunderbird/Installed");
exit(0);
}
include('mozilla_version.inc');
kb_base = 'MacOSX/Thunderbird';
get_kb_item_or_exit(kb_base+'/Installed');
version = get_kb_item_or_exit(kb_base+'/Version', exit_code:1);
path = get_kb_item_or_exit(kb_base+'/Path', exit_code:1);
is_esr = get_kb_item(kb_base+'/is_esr');
if (is_esr) exit(0, 'The Mozilla Thunderbird installation is in the ESR branch.');
mozilla_check_version(version:version, path:path, product:'thunderbird', esr:FALSE, fix:'78.8', severity:SECURITY_WARNING);
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
84.5%