Mozilla Foundation Security Advisory 2021-46

Security Vulnerabilities fixed in Thunderbird 78.15

Announced
October 5, 2021
Impact
high
Products
Thunderbird
Fixed in
  • Thunderbird 78.15

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-2021-38496: Use-after-free in MessageTask

Reporter
Yangkang of 360 ATA Team
Impact
high
Description

During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash.

References

#CVE-2021-38500: Memory safety bugs fixed in Thunderbird 78.15

Reporter
Mozilla developers
Impact
high
Description

Mozilla developers and community members Andreas Pehrson and Christian Holler reported memory safety bugs present in Thunderbird 78.14. 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