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AUSCERT External Security Bulletin Redistribution
MFSA 2020-09 Security Vulnerabilities fixed in Firefox ESR 68.6
11 March 2020
AusCERT Security Bulletin Summary
Product: Firefox ESR
Operating System: 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
CVE Names: CVE-2020-6814 CVE-2020-6812 CVE-2020-6811
CVE-2020-6807 CVE-2020-6806 CVE-2020-6805
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Mozilla Foundation Security Advisory 2020-09
Security Vulnerabilities fixed in Firefox ESR 68.6
March 10, 2020
Firefox ESR 68.6
# CVE-2020-6805: Use-after-free when removing data about origins
When removing data about an origin whose tab was recently closed, a
use-after-free could occur in the Quota manager, resulting in a potentially
o Bug 1610880
# CVE-2020-6806: BodyStream::OnInputStreamReady was missing protections against
Sergei Glazunov of Google Project Zero
By carefully crafting promise resolutions, it was possible to cause an
out-of-bounds read off the end of an array resized during script execution.
This could have led to memory corruption and a potentially exploitable crash.
o Bug 1612308
# CVE-2020-6807: Use-after-free in cubeb during stream destruction
When a device was changed while a stream was about to be destroyed, the
stream-reinit task may have been executed after the stream was destroyed,
causing a use-after-free and a potentially exploitable crash.
o Bug 1614971
# CVE-2020-6811: Devtools' 'Copy as cURL' feature did not fully escape
website-controlled data, potentially leading to command injection
The 'Copy as cURL' feature of Devtools' network tab did not properly escape the
HTTP method of a request, which can be controlled by the website. If a user
used the 'Copy as Curl' feature and pasted the command into a terminal, it
could have resulted in command injection and arbitrary command execution.
o Bug 1607742
# CVE-2019-20503: Out of bounds reads in sctp_load_addresses_from_init
Natalie Silvanovich of Google Project Zero
The inputs to sctp_load_addresses_from_init are verified by
sctp_arethere_unrecognized_parameters ; however, the two functions handled
parameter bounds differently, resulting in out of bounds reads when parameters
are partially outside a chunk.
o Bug 1613765
# CVE-2020-6812: The names of AirPods with personally identifiable information
were exposed to websites with camera or microphone permission
The first time AirPods are connected to an iPhone, they become named after the
user's name by default (e.g. Jane Doe's AirPods.) Websites with camera or
microphone permission are able to enumerate device names, disclosing the user's
name. To resolve this issue, Firefox added a special case that renames devices
containing the substring 'AirPods' to simply 'AirPods'.
o Bug 1616661
# CVE-2020-6814: Memory safety bugs fixed in Firefox 74 and Firefox ESR 68.6
Mozilla developers and community
Mozilla developers and community members Byron Campen, Jason Kratzer, and
Christian Holler reported memory safety bugs present in Firefox 73 and Firefox
ESR 68.5. 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
o Memory safety bugs fixed in Firefox 74 and Firefox ESR 68.6
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