The version of nss-util installed on the remote host is prior to 3.44.0-4. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-1942 advisory.

  - Empty or malformed p256-ECDH public keys may trigger a segmentation fault due values being improperly     sanitized before being copied into memory and used. This vulnerability affects Firefox ESR < 60.8, Firefox     < 68, and Thunderbird < 60.8. (CVE-2019-11729)

  - When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the     block size, a small out of bounds write could occur. This could have caused heap corruption and a     potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and     Firefox < 71. (CVE-2019-11745)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

A sandbox escape was discovered in Firefox. If a user were tricked in to installing a malicious language pack, an attacker could exploit this to gain additional privileges. (CVE-2019-9811)

Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass same origin restrictions, conduct cross-site scripting (XSS) attacks, conduct cross-site request forgery (CSRF) attacks, spoof origin attributes, spoof the addressbar contents, bypass safebrowsing protections, or execute arbitrary code.
(CVE-2019-11709, CVE-2019-11710, CVE-2019-11711, CVE-2019-11712, CVE-2019-11713, CVE-2019-11714, CVE-2019-11715, CVE-2019-11716, CVE-2019-11717, CVE-2019-11718, CVE-2019-11719, CVE-2019-11720, CVE-2019-11721, CVE-2019-11723, CVE-2019-11724, CVE-2019-11725, CVE-2019-11727, CVE-2019-11728, CVE-2019-11729)

It was discovered that Firefox treats all files in a directory as same origin. If a user were tricked in to downloading a specially crafted HTML file, an attacker could potentially exploit this to obtain sensitive information from local files. (CVE-2019-11730).

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.

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 68.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2019-28 advisory.

  - When an inner window is reused, it does not consider the     use of document.domain for cross-origin protections. If     pages on different subdomains ever cooperatively use     document.domain, then either page can abuse this to     inject script into arbitrary pages on the other     subdomain, even those that did not use document.domain     to relax their origin security. This vulnerability     affects Firefox ESR < 60.8, Firefox < 68, and     Thunderbird < 60.8. (CVE-2019-11711)

  - POST requests made by NPAPI plugins, such as Flash, that     receive a status 308 redirect response can bypass CORS     requirements. This can allow an attacker to perform     Cross-Site Request Forgery (CSRF) attacks. This     vulnerability affects Firefox ESR < 60.8, Firefox < 68,     and Thunderbird < 60.8. (CVE-2019-11712)

  - A use-after-free vulnerability can occur in HTTP/2 when     a cached HTTP/2 stream is closed while still in use,     resulting in a potentially exploitable crash. This     vulnerability affects Firefox ESR < 60.8, Firefox < 68,     and Thunderbird < 60.8. (CVE-2019-11713)

  - Necko can access a child on the wrong thread during UDP     connections, resulting in a potentially exploitable     crash in some instances. This vulnerability affects     Firefox < 68. (CVE-2019-11714)

  - Empty or malformed p256-ECDH public keys may trigger a     segmentation fault due values being improperly sanitized     before being copied into memory and used. This     vulnerability affects Firefox ESR < 60.8, Firefox < 68,     and Thunderbird < 60.8. (CVE-2019-11729)

  - Due to an error while parsing page content, it is     possible for properly sanitized user input to be     misinterpreted and lead to XSS hazards on web sites in     certain circumstances. This vulnerability affects     Firefox ESR < 60.8, Firefox < 68, and Thunderbird <     60.8. (CVE-2019-11715)

  - Until explicitly accessed by script, window.globalThis     is not enumerable and, as a result, is not visible to     code such as Object.getOwnPropertyNames(window). Sites     that deploy a sandboxing that depends on enumerating and     freezing access to the window object may miss this,     allowing their sandboxes to be bypassed. This     vulnerability affects Firefox < 68. (CVE-2019-11716)

  - A vulnerability exists where the caret (^) character     is improperly escaped constructing some URIs due to it     being used as a separator, allowing for possible     spoofing of origin attributes. This vulnerability     affects Firefox ESR < 60.8, Firefox < 68, and     Thunderbird < 60.8. (CVE-2019-11717)

  - When importing a curve25519 private key in PKCS#8format     with leading 0x00 bytes, it is possible to trigger an     out-of-bounds read in the Network Security Services     (NSS) library. This could lead to information     disclosure. This vulnerability affects Firefox ESR <     60.8, Firefox < 68, and Thunderbird < 60.8.
    (CVE-2019-11719)

  - Some unicode characters are incorrectly treated as     whitespace during the parsing of web content instead of     triggering parsing errors. This allows malicious code to     then be processed, evading cross-site scripting (XSS)     filtering. This vulnerability affects Firefox < 68.
    (CVE-2019-11720)

  - The unicode latin 'kra' character can be used to spoof a     standard 'k' character in the addressbar. This allows     for domain spoofing attacks as do not display as     punycode text, allowing for user confusion. This     vulnerability affects Firefox < 68. (CVE-2019-11721)

  - A vulnerability exists where if a user opens a locally     saved HTML file, this file can use file: URIs to access     other files in the same directory or sub-directories if     the names are known or guessed. The Fetch API can then     be used to read the contents of any files stored in     these directories and they may uploaded to a server. It     was demonstrated that in combination with a popular     Android messaging app, if a malicious HTML attachment is     sent to a user and they opened that attachment in     Firefox, due to that app's predictable pattern for     locally-saved file names, it is possible to read     attachments the victim received from other     correspondents. This vulnerability affects Firefox ESR <     60.8, Firefox < 68, and Thunderbird < 60.8.
    (CVE-2019-11730)

  - A vulnerability exists during the installation of add-     ons where the initial fetch ignored the origin     attributes of the browsing context. This could leak     cookies in private browsing mode or across different     containers for people who use the Firefox Multi-     Account Containers Web Extension. This vulnerability     affects Firefox < 68. (CVE-2019-11723)

  - Application permissions give additional remote     troubleshooting permission to the site     input.mozilla.org, which has been retired and now     redirects to another site. This additional permission is     unnecessary and is a potential vector for malicious     attacks. This vulnerability affects Firefox < 68.
    (CVE-2019-11724)

  - When a user navigates to site marked as unsafe by the     Safebrowsing API, warning messages are displayed and     navigation is interrupted but resources from the same     site loaded through websockets are not blocked, leading     to the loading of unsafe resources and bypassing     safebrowsing protections. This vulnerability affects     Firefox < 68. (CVE-2019-11725)

  - A vulnerability exists where it possible to force     Network Security Services (NSS) to sign     CertificateVerify with PKCS#1 v1.5 signatures when those     are the only ones advertised by server in     CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures     should not be used for TLS 1.3 messages. This     vulnerability affects Firefox < 68. (CVE-2019-11727)

  - The HTTP Alternative Services header, Alt-Svc, can be     used by a malicious site to scan all TCP ports of any     host that the accessible to a user when web content is     loaded. This vulnerability affects Firefox < 68.
    (CVE-2019-11728)

  - Mozilla developers and community members reported memory     safety bugs present in Firefox 67. Some of these bugs     showed evidence of memory corruption and we presume that     with enough effort that some of these could be exploited     to run arbitrary code. This vulnerability affects     Firefox < 68. (CVE-2019-11710)

  - Mozilla developers and community members reported memory     safety bugs present in Firefox 67 and Firefox ESR 60.7.
    Some of these bugs showed evidence of memory corruption     and we presume that with enough effort that some of     these could be exploited to run arbitrary code. This     vulnerability affects Firefox ESR < 60.8, Firefox < 68,     and Thunderbird < 60.8. (CVE-2019-11709)

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

ID	Name	Product	Family	Published	Updated	Severity
171835	Amazon Linux 2 : nss-util (ALAS-2023-1942)	Nessus	Amazon Linux Local Security Checks	2/23/2023	2/23/2023	high
126698	Ubuntu 16.04 LTS / 18.04 LTS : Firefox vulnerabilities (USN-4054-1)	Nessus	Ubuntu Local Security Checks	7/15/2019	10/20/2023	critical
128969	Mozilla Thunderbird < 68.0	Nessus	MacOS X Local Security Checks	9/17/2019	4/24/2024	critical

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