KLA12305
Multiple vulnerabilities in Mozilla Firefox ESR

Updated: 10/14/2021
Detect date
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10/05/2021
Severity
?
High
Description

Multiple vulnerabilities were found in Mozilla Firefox ESR. Malicious users can exploit these vulnerabilities to execute arbitrary code, cause denial of service, obtain sensitive information, spoof user interface.

Below is a complete list of vulnerabilities:

  1. A memory safety vulnerability can be exploited to execute arbitrary code.
  2. An use after free vulnerability in MessageTask can be exploited to cause denial of service.
  3. A data race vulnerability in crossbeam-deque can be exploited to obtain sensitive information.
  4. A security UI vulnerability in message validation can be exploited to spoof user interface.
  5. An use after free vulnerability in nsLanguageAtomService object can be exploited to cause denial of service.
Affected products

Mozilla Firefox ESR earlier than 91.2

Solution

Update to the latest version
Download Firefox ESR

Original advisories

MFSA2021-45

Impacts
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ACE 
[?]

OSI 
[?]

DoS 
[?]

SUI 
[?]
Related products
Mozilla Firefox ESR
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