firefox-78.2.0

[Bruce Dubbs]

New minor version.

Consider for 10.0

[ken@…]

Security issues fixed in 78.2.0 ​https://www.mozilla.org/en-US/security/advisories/mfsa2020-38/

         

#CVE-2020-15663: Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege

Reporter
    Xiaoyin Liu
Impact
    high

Description

If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to a previous version which would have allowed exploitation of an older bug and arbitrary code execution with System Privileges.
Note: This issue only affected Windows operating systems. Other operating systems are unaffected.
References

    Bug 1643199

#CVE-2020-15664: Attacker-induced prompt for extension installation

Reporter
    Kaizer Soze
Impact
    high

Description

By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed.
References

    Bug 1658214

#CVE-2020-15670: Memory safety bugs fixed in Firefox 80 and Firefox ESR 78.2

Reporter
    Mozilla developers and community
Impact
    high

Description

Mozilla developers Jason Kratzer, Christian Holler, Byron Campen, Tyson Smith reported memory safety bugs present in Firefox 79 and Firefox ESR 78.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
References

    Memory safety bugs fixed in Firefox 80 and Firefox ESR 78.2

[ken@…]

r23622.