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AUSCERT External Security Bulletin Redistribution
ESB-2020.2578
MFSA 2020-31 Security Vulnerabilities fixed in Firefox ESR 68.11
29 July 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Firefox ESR 68.11
Publisher: Mozilla
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Privileged Data -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-15659 CVE-2020-15652 CVE-2020-6514
CVE-2020-6463
Reference: ESB-2020.2569
ESB-2020.2410
Original Bulletin:
https://www.mozilla.org/en-US/security/advisories/mfsa2020-31/
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Mozilla Foundation Security Advisory 2020-31
Security Vulnerabilities fixed in Firefox ESR 68.11
Announced
July 28, 2020
Impact
high
Products
Firefox ESR
Fixed in
Firefox ESR 68.11
# CVE-2020-15652: Potential leak of redirect targets when loading scripts in a
worker
Reporter
Mikhail Oblozhikhin
Impact
high
Description
By observing the stack trace for JavaScript errors in web workers, it was
possible to leak the result of a cross-origin redirect. This applied only to
content that can be parsed as script.
References
o Bug 1634872
# CVE-2020-6514: WebRTC data channel leaks internal address to peer
Reporter
Natalie Silvanovich of Google Project Zero
Impact
high
Description
WebRTC used the memory address of a class instance as a connection identifier.
Unfortunately, this value is often transmitted to the peer, which allows
bypassing ASLR.
References
o Bug 1642792
# CVE-2020-6463: Use-after-free in ANGLE gl::Texture::onUnbindAsSamplerTexture
Reporter
Reported by Pawel Wylecial of REDTEAM.PL
Impact
moderate
Description
Crafted media files could lead to a race in texture caches, resulting in a
use-after-free, memory corruption, and a potentially exploitable crash.
References
o Bug 1635293
# CVE-2020-15659: Memory safety bugs fixed in Firefox 79 and Firefox ESR 68.11
Reporter
Mozilla developers and community
Impact
high
Description
Mozilla developers Jason Kratzer and Luke Wagner reported memory safety bugs
present in Firefox 78 and Firefox ESR 68.01. 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 79 and Firefox ESR 68.11
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