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AUSCERT External Security Bulletin Redistribution
ESB-2020.1920
MFSA 2020-21 Security Vulnerabilities fixed in Firefox ESR 68.9
3 June 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Firefox ESR
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
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12410 CVE-2020-12406 CVE-2020-12405
CVE-2020-12399
Reference: ESB-2020.1919
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2020-21/
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Mozilla Foundation Security Advisory 2020-21
Security Vulnerabilities fixed in Firefox ESR 68.9
Announced
June 2, 2020
Impact
high
Products
Firefox ESR
Fixed in
Firefox ESR 68.9
# CVE-2020-12399: Timing attack on DSA signatures in NSS library
Reporter
Cesar Pereida Garcia and the Network and Information Security Group (NISEC)
at Tampere University
Impact
high
Description
NSS has shown timing differences when performing DSA signatures, which was
exploitable and could eventually leak private keys.
References
o Bug 1631576
# CVE-2020-12405: Use-after-free in SharedWorkerService
Reporter
Marcin 'Icewall' Noga of Cisco Talos
Impact
high
Description
When browsing a malicious page, a race condition in our SharedWorkerService
could occur and lead to a potentially exploitable crash.
References
o Bug 1631618
# CVE-2020-12406: JavaScript Type confusion with NativeTypes
Reporter
Iain Ireland
Impact
high
Description
Mozilla developer Iain Ireland discovered a missing type check during unboxed
objects removal, resulting in a crash. We presume that with enough effort that
it could be exploited to run arbitrary code.
References
o Bug 1639590
# CVE-2020-12410: Memory safety bugs fixed in Firefox 77 and Firefox ESR 68.9
Reporter
Mozilla developers
Impact
high
Description
Mozilla developers Tom Tung and Karl Tomlinson reported memory safety bugs
present in Firefox 76 and Firefox ESR 68.8. 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 Firefox 77 and Firefox ESR 68.9
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