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AUSCERT External Security Bulletin Redistribution
ESB-2020.3629
MFSA 2020-47 Security Vulnerabilities fixed in Thunderbird 78.4
22 October 2020
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AusCERT Security Bulletin Summary
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Product: Thunderbird
Publisher: Mozilla
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-15969 CVE-2020-15683
Reference: ESB-2020.3612
ESB-2020.3531
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2020-47/
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Mozilla Foundation Security Advisory 2020-47
Security Vulnerabilities fixed in Thunderbird 78.4
Announced
October 21, 2020
Impact
high
Products
Thunderbird
Fixed in
Thunderbird 78.4
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-2020-15969: Use-after-free in usersctp
Reporter
Mark Wodrich of Google
Impact
high
Description
A use-after-free bug in the usersctp library was reported upstream. We assume
this could have led to memory corruption and a potentially exploitable crash.
References
o Bug 1666570
o [sctplab] upstream usrsctp fix
# CVE-2020-15683: Memory safety bugs fixed in Thunderbird 78.4
Reporter
Mozilla developers and community
Impact
high
Description
Mozilla developers and community members Jason Kratzer, Simon Giesecke,
Philipp, and Christian Holler reported memory safety bugs present in
Thunderbird 78.3. 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
o Memory safety bugs fixed in Thunderbird 78.4
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