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Ubuntu: (Multiple Advisories) (CVE-2019-9792): Firefox regressions

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Ubuntu: (Multiple Advisories) (CVE-2019-9792): Firefox regressions

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
Published
03/19/2019
Created
04/22/2019
Added
04/01/2019
Modified
03/02/2020

Description

The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Solution(s)

  • ubuntu-upgrade-firefox
  • ubuntu-upgrade-thunderbird

References

  • USN-3918-1
  • USN-3918-2
  • USN-3918-3
  • USN-3918-4
  • USN-3927-1
  • CVE-2019-9792

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