6.8 Medium
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
8.8 High
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
9.2 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
80.9%
The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 68.4. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-02 advisory.
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. (CVE-2019-17016)
Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. (CVE-2019-17017)
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node’s innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)
Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in Firefox 71 and Firefox ESR 68.3. 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-2019-17024)
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 mfsa2020-02.
# The text itself is copyright (C) Mozilla Foundation.
include('compat.inc');
if (description)
{
script_id(132710);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/01");
script_cve_id(
"CVE-2019-17016",
"CVE-2019-17017",
"CVE-2019-17022",
"CVE-2019-17024"
);
script_xref(name:"MFSA", value:"2020-02");
script_name(english:"Mozilla Firefox ESR < 68.4 Multiple Vulnerabilities");
script_set_attribute(attribute:"synopsis", value:
"A web browser installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 68.4. It is, therefore, affected
by multiple vulnerabilities as referenced in the mfsa2020-02 advisory.
- When pasting a <style> tag from the
clipboard into a rich text editor, the CSS sanitizer
incorrectly rewrites a @namespace rule. This could allow
for injection into certain types of websites resulting
in data exfiltration. (CVE-2019-17016)
- Due to a missing case handling object types, a type
confusion vulnerability could occur, resulting in a
crash. We presume that with enough effort that it could
be exploited to run arbitrary code. (CVE-2019-17017)
- When pasting a <style> tag from the
clipboard into a rich text editor, the CSS sanitizer
does not escape < and > characters. Because the
resulting string is pasted directly into the text node
of the element this does not result in a direct
injection into the webpage; however, if a webpage
subsequently copies the node's innerHTML, assigning it
to another innerHTML, this would result in an XSS
vulnerability. Two WYSIWYG editors were identified with
this behavior, more may exist. (CVE-2019-17022)
- Mozilla developers Jason Kratzer, Christian Holler, and
Bob Clary reported memory safety bugs present in Firefox
71 and Firefox ESR 68.3. 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-2019-17024)
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/mfsa2020-02/");
script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox ESR version 68.4 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:POC/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:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-17024");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/07");
script_set_attribute(attribute:"patch_publication_date", value:"2020/01/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/08");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:firefox_esr");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"MacOS X Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("macosx_firefox_installed.nasl");
script_require_keys("MacOSX/Firefox/Version");
exit(0);
}
include('mozilla_version.inc');
kb_base = 'MacOSX/Firefox';
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 (isnull(is_esr)) audit(AUDIT_NOT_INST, 'Mozilla Firefox ESR');
mozilla_check_version(version:version, path:path, product:'firefox', esr:TRUE, fix:'68.4', min:'68.0.0', xss:TRUE, severity:SECURITY_WARNING);
Vendor | Product | Version | CPE |
---|---|---|---|
mozilla | firefox_esr | cpe:/a:mozilla:firefox_esr |
6.8 Medium
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
8.8 High
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
9.2 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
80.9%