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
9.4 High
AI Score
Confidence
High
0.017 Low
EPSS
Percentile
87.8%
The version of Firefox installed on the remote macOS or Mac OS X host is prior to 91.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2021-33 advisory.
A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. Note: This issue only affected Linux operating systems. Other operating systems are unaffected. (CVE-2021-29986)
An issue present in lowering/register allocation could have led to obscure but deterministic register confusion failures in JITted code that would lead to a potentially exploitable crash. (CVE-2021-29981)
Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially exploitable crash. (CVE-2021-29988)
Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interactions that should cause it to exit. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. (CVE-2021-29983)
Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash.
(CVE-2021-29984)
Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. (CVE-2021-29980)
After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to.This bug only affects Firefox on Linux. Other operating systems are unaffected. (CVE-2021-29987)
A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash. (CVE-2021-29985)
Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting in the potential leak of a single bit of memory. (CVE-2021-29982)
Mozilla developers Christoph Kerschbaumer, Olli Pettay, Sandor Molnar, and Simon Giesecke reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. 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-2021-29989)
Mozilla developers and community members Kershaw Chang, Philipp, Chris Peterson, and Sebastian Hengst reported memory safety bugs present in Firefox 90. 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-2021-29990)
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 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Mozilla Foundation Security Advisory mfsa2021-33.
# The text itself is copyright (C) Mozilla Foundation.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(152413);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/04");
script_cve_id(
"CVE-2021-29980",
"CVE-2021-29981",
"CVE-2021-29982",
"CVE-2021-29983",
"CVE-2021-29984",
"CVE-2021-29985",
"CVE-2021-29986",
"CVE-2021-29987",
"CVE-2021-29988",
"CVE-2021-29989",
"CVE-2021-29990"
);
script_xref(name:"IAVA", value:"2021-A-0366-S");
script_name(english:"Mozilla Firefox < 91.0");
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 installed on the remote macOS or Mac OS X host is prior to 91.0. It is, therefore, affected by
multiple vulnerabilities as referenced in the mfsa2021-33 advisory.
- A suspected race condition when calling getaddrinfo led to memory corruption and a
potentially exploitable crash. Note: This issue only affected Linux operating systems. Other operating
systems are unaffected. (CVE-2021-29986)
- An issue present in lowering/register allocation could have led to obscure but deterministic register
confusion failures in JITted code that would lead to a potentially exploitable crash. (CVE-2021-29981)
- Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds
read or memory corruption, and a potentially exploitable crash. (CVE-2021-29988)
- Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interactions that
should cause it to exit. Note: This issue only affected Firefox for Android. Other operating systems
are unaffected. (CVE-2021-29983)
- Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly
considered during garbage collection. This led to memory corruption and a potentially exploitable crash.
(CVE-2021-29984)
- Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption
and a potentially exploitable crash. (CVE-2021-29980)
- After requesting multiple permissions, and closing the first permission panel, subsequent permission
panels will be displayed in a different position but still record a click in the default location, making
it possible to trick a user into accepting a permission they did not want to.This bug only affects
Firefox on Linux. Other operating systems are unaffected. (CVE-2021-29987)
- A use-after-free vulnerability in media channels could have led to memory corruption and a potentially
exploitable crash. (CVE-2021-29985)
- Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object,
resulting in the potential leak of a single bit of memory. (CVE-2021-29982)
- Mozilla developers Christoph Kerschbaumer, Olli Pettay, Sandor Molnar, and Simon Giesecke reported memory
safety bugs present in Firefox 90 and Firefox ESR 78.12. 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-2021-29989)
- Mozilla developers and community members Kershaw Chang, Philipp, Chris Peterson, and Sebastian Hengst
reported memory safety bugs present in Firefox 90. 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-2021-29990)
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/mfsa2021-33/");
script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Firefox version 91.0 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-2021-29990");
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:"2021/08/10");
script_set_attribute(attribute:"patch_publication_date", value:"2021/08/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/10");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:firefox");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"MacOS X Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("macosx_firefox_installed.nasl");
script_require_keys("MacOSX/Firefox/Installed");
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 (is_esr) exit(0, 'The Mozilla Firefox installation is in the ESR branch.');
mozilla_check_version(version:version, path:path, product:'firefox', esr:FALSE, fix:'91.0', severity:SECURITY_WARNING);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29980
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29981
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29982
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29983
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29984
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29985
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29986
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29987
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29988
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29989
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29990
www.mozilla.org/en-US/security/advisories/mfsa2021-33/
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
9.4 High
AI Score
Confidence
High
0.017 Low
EPSS
Percentile
87.8%