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, spoof the browser UI, trick the user in to launching local executable binaries, obtain sensitive information, conduct cross-site scripting (XSS) attacks, or execute arbitrary code. (CVE-2019-11691, CVE-2019-11692, CVE-2019-11693, CVE-2019-11695, CVE-2019-11696, CVE-2019-11699, CVE-2019-11701, CVE-2019-7317, CVE-2019-9800, CVE-2019-9814, CVE-2019-9817, CVE-2019-9819, CVE-2019-9820, CVE-2019-9821)

It was discovered that pressing certain key combinations could bypass addon installation prompt delays. If a user opened a specially crafted website, an attacker could potentially exploit this to trick them in to installing a malicious extension. (CVE-2019-11697)

It was discovered that history data could be exposed via drag and drop of hyperlinks to and from bookmarks. If a user were tricked in to dragging a specially crafted hyperlink to the bookmark toolbar or sidebar, and subsequently back in to the web content area, an attacker could potentially exploit this to obtain sensitive information.
(CVE-2019-11698)

A type confusion bug was discovered with object groups and UnboxedObjects. If a user were tricked in to opening a specially crafted website after enabling the UnboxedObjects feature, an attacker could potentially exploit this to bypass security checks.
(CVE-2019-9816).

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.

Detections

Analytics

Ubuntu 16.04 LTS / 18.04 LTS : Firefox vulnerabilities (USN-3991-1)

critical Nessus Plugin ID 125339

Version 1.10

Version 1.6

Version 1.10 Oct 21, 2023, 5:06 AM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:F/RL:OF/RC:C". "CVSSv3 temporal vector" set to "CVSS:3.0/E:F/RL:O/RC:C") CVSSv2 score source (set to "CVE-2019-9820") Detection Plugin metadata Plugin Feed: 202310210506
Version 1.6 Dec 6, 2022, 2:54 AM Reference Plugin Feed: 202212060254