CVE-2019-11763

CVE Details

Release Date:	2020-01-08
Impact:	None	What is this?

Description

Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

See more information about CVE-2019-11763 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	6.1
Vector String:	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Version:	3.0
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	Required
Scope:	Changed
Confidentiality Impact:	Low
Integrity Impact:	Low
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (firefox)	ELSA-2019-3281	2020-07-07
Oracle Linux version 7 (firefox)	ELSA-2019-3193	2019-10-23
Oracle Linux version 7 (thunderbird)	ELSA-2019-3210	2019-10-29
Oracle Linux version 8 (firefox)	ELSA-2019-3196	2019-10-24
Oracle Linux version 8 (thunderbird)	ELSA-2019-3237	2019-10-30