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
AI Score
Confidence
High
EPSS
Percentile
85.7%
The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 68.5. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-07 advisory.
When processing an email message with an ill-formed envelope, Thunderbird could read data from a random memory location. (CVE-2020-6793)
If a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords is still accessible. This is because the older stored password file was not deleted when the data was copied to a new format starting in Thunderbird 60.
The new master password is added only on the new file.
This could allow the exposure of stored password data outside of user expectations. (CVE-2020-6794)
When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. (CVE-2020-6795)
By downloading a file with the .fileloc extension, a semi-privileged extension could launch an arbitrary application on the user’s computer. The attacker is restricted as they are unable to download non- quarantined files or supply command line arguments to the application, limiting the impact.Note: this issue only occurs on Mac OSX. Other operating systems are unaffected. (CVE-2020-6797)
If a <template> tag was used in a <select%gt; tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result.In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. (CVE-2020-6798)
When deriving an identifier for an email message, uninitialized memory was used in addition to the message contents. (CVE-2020-6792)
Mozilla developers and community members Raul Gurzau, Tyson Smith, Bob Clary, Liz Henry, and Christian Holler reported memory safety bugs present in Firefox 72 and Firefox ESR 68.4. 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.In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts.
(CVE-2020-6800)
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 mfsa2020-07.
# The text itself is copyright (C) Mozilla Foundation.
include('compat.inc');
if (description)
{
script_id(133690);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/27");
script_cve_id(
"CVE-2020-6792",
"CVE-2020-6793",
"CVE-2020-6794",
"CVE-2020-6795",
"CVE-2020-6797",
"CVE-2020-6798",
"CVE-2020-6800"
);
script_xref(name:"MFSA", value:"2020-07");
script_xref(name:"IAVA", value:"2020-A-0072-S");
script_name(english:"Mozilla Thunderbird < 68.5");
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 68.5. It is, therefore, affected
by multiple vulnerabilities as referenced in the mfsa2020-07 advisory.
- When processing an email message with an ill-formed
envelope, Thunderbird could read data from a random
memory location. (CVE-2020-6793)
- If a user saved passwords before Thunderbird 60 and then
later set a master password, an unencrypted copy of
these passwords is still accessible. This is because the
older stored password file was not deleted when the data
was copied to a new format starting in Thunderbird 60.
The new master password is added only on the new file.
This could allow the exposure of stored password data
outside of user expectations. (CVE-2020-6794)
- When processing a message that contains multiple S/MIME
signatures, a bug in the MIME processing code caused a
null pointer dereference, leading to an unexploitable
crash. (CVE-2020-6795)
- By downloading a file with the .fileloc extension, a
semi-privileged extension could launch an arbitrary
application on the user's computer. The attacker is
restricted as they are unable to download non-
quarantined files or supply command line arguments to
the application, limiting the impact.Note: this
issue only occurs on Mac OSX. Other operating systems
are unaffected. (CVE-2020-6797)
- If a <template> tag was used in a
<select%gt; tag, the parser could be
confused and allow JavaScript parsing and execution when
it should not be allowed. A site that relied on the
browser behaving correctly could suffer a cross-site
scripting vulnerability as a result.In general, this
flaw cannot be exploited through email in the
Thunderbird product because scripting is disabled when
reading mail, but is potentially a risk in browser or
browser-like contexts. (CVE-2020-6798)
- When deriving an identifier for an email message,
uninitialized memory was used in addition to the message
contents. (CVE-2020-6792)
- Mozilla developers and community members Raul Gurzau,
Tyson Smith, Bob Clary, Liz Henry, and Christian Holler
reported memory safety bugs present in Firefox 72 and
Firefox ESR 68.4. 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.In general, these flaws cannot be exploited
through email in the Thunderbird product because
scripting is disabled when reading mail, but are
potentially risks in browser or browser-like contexts.
(CVE-2020-6800)
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/mfsa2020-07/");
script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Thunderbird version 68.5 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-2020-6800");
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:"2020/02/11");
script_set_attribute(attribute:"patch_publication_date", value:"2020/02/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/14");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:thunderbird");
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) 2020-2024 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:'68.5', severity:SECURITY_WARNING);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6792
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6793
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6794
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6795
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6797
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6798
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6800
www.mozilla.org/en-US/security/advisories/mfsa2020-07/
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
AI Score
Confidence
High
EPSS
Percentile
85.7%