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 mfsa2020-06 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Security Fix(es) :

Mozilla: Memory safety bugs fixed in Firefox 73 and Firefox ESR 68.5 (CVE-2020-6800) Mozilla: Out-of-bounds read when processing certain email messages (CVE-2020-6793) Mozilla: Setting a master password post-Thunderbird 52 does not delete unencrypted previously stored passwords (CVE-2020-6794) Mozilla: Crash processing S/MIME messages with multiple signatures (CVE-2020-6795) Mozilla: Incorrect parsing of template tag could result in JavaScript injection (CVE-2020-6798) Mozilla: Message ID calculation was based on uninitialized data (CVE-2020-6792)

The remote host is affected by the vulnerability described in GLSA-202003-02 (Mozilla Firefox: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Mozilla Firefox. Please       review the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could entice a user to view a specially crafted web       page, possibly resulting in the execution of arbitrary code with the       privileges of the process or a Denial of Service condition. Furthermore,       a remote attacker may be able to perform Man-in-the-Middle attacks,       obtain sensitive information, spoof the address bar, conduct clickjacking       attacks, bypass security restrictions and protection mechanisms, or have       other unspecified impact.
  Workaround :

    There is no known workaround at this time.

The remote host is affected by the vulnerability described in GLSA-202003-10 (Mozilla Thunderbird: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Mozilla Thunderbird.
      Please review the CVE identifiers referenced below for details.
  Impact :

    A remote attacker may be able to execute arbitrary code, cause a Denial       of Service condition, obtain sensitive information, or conduct Cross-Site       Request Forgery (CSRF).
  Workaround :

    There is no known workaround at this time.

When deriving an identifier for an email message, uninitialized memory was used in addition to the message contents. This vulnerability affects Thunderbird < 68.5. (CVE-2020-6792)

When processing an email message with an ill-formed envelope, Thunderbird could read data from a random memory location. This vulnerability affects Thunderbird < 68.5. (CVE-2020-6793)

Mozilla developers and community members 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. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5. (CVE-2020-6800)

If a template tag was used in a select 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. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.
(CVE-2020-6798)

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. This vulnerability affects Thunderbird < 68.5.
(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. This vulnerability affects Thunderbird < 68.5. (CVE-2020-6795)

Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, bypass same-origin restrictions, conduct cross-site scripting (XSS) attacks, or execute arbitrary code. (CVE-2019-11757, CVE-2019-11758, CVE-2019-11759, CVE-2019-11760, CVE-2019-11761, CVE-2019-11762, CVE-2019-11763, CVE-2019-11764, CVE-2019-17005, CVE-2019-17008, CVE-2019-17010, CVE-2019-17011, CVE-2019-17012, CVE-2019-17016, CVE-2019-17017, CVE-2019-17022, CVE-2019-17024, CVE-2019-17026, CVE-2019-20503, CVE-2020-6798, CVE-2020-6800, CVE-2020-6805, CVE-2020-6806, CVE-2020-6807, CVE-2020-6812, CVE-2020-6814, CVE-2020-6819, CVE-2020-6820, CVE-2020-6821, CVE-2020-6825)

It was discovered that NSS incorrectly handled certain memory operations. A remote attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2019-11745)

It was discovered that a specially crafted S/MIME message with an inner encryption layer could be displayed as having a valid signature in some circumstances, even if the signer had no access to the encrypted message. An attacker could potentially exploit this to spoof the message author. (CVE-2019-11755)

A heap overflow was discovered in the expat library in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2019-15903)

It was discovered that Message ID calculation was based on uninitialized data. An attacker could potentially exploit this to obtain sensitive information. (CVE-2020-6792)

Mutiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. (CVE-2020-6793, CVE-2020-6795, CVE-2020-6822)

It was discovered that if a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords would still be accessible. A local user could exploit this to obtain sensitive information. (CVE-2020-6794)

It was discovered that the Devtools' 'Copy as cURL' feature did not fully escape website-controlled data. If a user were tricked in to using the 'Copy as cURL' feature to copy and paste a command with specially crafted data in to a terminal, an attacker could potentially exploit this to execute arbitrary commands via command injection.
(CVE-2020-6811).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
133849	Mozilla Firefox ESR < 68.5 Multiple Vulnerabilities	Nessus	MacOS X Local Security Checks	2/21/2020	5/8/2020	high
134071	Scientific Linux Security Update : thunderbird on SL6.x i386/x86_64 (20200224)	Nessus	Scientific Linux Local Security Checks	2/26/2020	3/26/2024	high
134469	GLSA-202003-02 : Mozilla Firefox: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	3/13/2020	12/7/2022	critical
134587	GLSA-202003-10 : Mozilla Thunderbird: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	3/16/2020	9/28/2020	critical
134899	Amazon Linux 2 : thunderbird (ALAS-2020-1408)	Nessus	Amazon Linux Local Security Checks	3/26/2020	3/20/2024	high
135896	Ubuntu 16.04 LTS : Thunderbird vulnerabilities (USN-4335-1)	Nessus	Ubuntu Local Security Checks	4/22/2020	10/20/2023	critical

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