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[MFSA-2020-40] Security Vulnerabilities fixed in Thunderbird 68.12

Severity High
Affected Packages 1
Fixed Packages 1
CVEs 3
Info Packages References Vulnerabilities

In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts.

  • CVE-2020-15663: Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege (high)
    If Thunderbird 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.

  • CVE-2020-15664: Attacker-induced prompt for extension installation (high)
    By holding a reference to the <code>eval()</code> 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.

  • CVE-2020-15669: Use-After-Free when aborting an operation (high)
    When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code.

Package Affected Version
pkg:mozilla/Thunderbird < 68.12
Package Fixed Version
pkg:mozilla/Thunderbird = 68.12
ID
MFSA-2020-40
Severity
high
URL
https://www.mozilla.org/en-US/security/advisories/mfsa2020-40
Published
2020-08-25T00:00:00
(4 years ago)
Modified
2020-08-25T00:00:00
(4 years ago)
Other Advisories
Type Package URL Namespace Name / Product Version Distribution / Platform Arch Patch / Fix
Affected pkg:mozilla/Thunderbird Thunderbird < 68.12
Fixed pkg:mozilla/Thunderbird Thunderbird = 68.12
# CVE Description CVSS EPSS EPSS Trend (30 days) Affected Products Weaknesses Security Advisories Exploits PoC Pubblication Date Modification Date
# CVE Description CVSS EPSS EPSS Trend (30 days) Affected Products Weaknesses Security Advisories PoC Pubblication Date Modification Date