Multiple vulnerabilities in Mozilla Firefox ESR

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.

Original advisories

• MFSA2021-45

Related products

• Mozilla-Firefox-ESR

CVE list

• CVE-2021-38501
  critical
• CVE-2021-38496
  critical
• CVE-2021-38500
  critical
• CVE-2021-32810
  critical
• CVE-2021-38497
  high
• CVE-2021-38498
  critical

Read more

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