Arch Linux Security Advisory ASA-202003-8

Severity: Critical
Date : 2020-03-11
CVE-ID : CVE-2019-20503 CVE-2020-6805 CVE-2020-6806 CVE-2020-6807
CVE-2020-6808 CVE-2020-6809 CVE-2020-6810 CVE-2020-6811
CVE-2020-6812 CVE-2020-6813 CVE-2020-6814 CVE-2020-6815
Package : firefox
Type : multiple issues
Remote : Yes
Link : https://security.archlinux.org/AVG-1112

Summary

The package firefox before version 74.0-1 is vulnerable to multiple
issues including arbitrary code execution, access restriction bypass,
arbitrary command execution, content spoofing and information
disclosure.

Resolution

Upgrade to 74.0-1.

pacman -Syu “firefox>=74.0-1”

The problems have been fixed upstream in version 74.0.

Workaround

None.

Description

• CVE-2019-20503 (information disclosure)

An out-of-bounds read has been found in Firefox before 74. 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.

• CVE-2020-6805 (arbitrary code execution)

A use-after-free issue has been found in Firefox before 74. 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
exploitable crash.

• CVE-2020-6806 (arbitrary code execution)

A state confusion issue has been found in Firefox before 74, in
BodyStream::OnInputStreamReady. 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.

• CVE-2020-6807 (arbitrary code execution)

A use-after-free issue has been found in Firefox before 74, 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.

• CVE-2020-6808 (content spoofing)

A security issue has been found in Firefox before 74 where, when a
JavaScript URL (javascript:) is evaluated and the result is a string,
this string is parsed to create an HTML document, which is then
presented. Previously, this document’s URL (as reported by the
document.location property, for example) was the originating
javascript: URL which could lead to spoofing attacks; it is now
correctly the URL of the originating document.

• CVE-2020-6809 (access restriction bypass)

A security issue has been found in Firefox before 74 where, when a Web
Extension had the all-urls permission and made a fetch request with a
mode set to ‘same-origin’, it was possible for the Web Extension to
read local files.

• CVE-2020-6810 (content spoofing)

A security issue has been found in Firefox before 74 where, after a
website had entered fullscreen mode, it could have used a previously
opened popup to obscure the notification that indicates the browser is
in fullscreen mode. Combined with spoofing the browser chrome, this
could have led to confusing the user about the current origin of the
page and credential theft or other attacks.

• CVE-2020-6811 (arbitrary command execution)

A security issue has been found in Firefox before 74, where 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.

• CVE-2020-6812 (information disclosure)

An information disclosure issue has been found in Firefox before 74.
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’.

• CVE-2020-6813 (access restriction bypass)

A Content Security Policy bypass has been found in Firefox before 74.
When protecting CSS blocks with the nonce feature of Content Security
Policy, the @import statement in the CSS block could allow an attacker
to inject arbitrary styles, bypassing the intent of the Content
Security Policy.

• CVE-2020-6814 (arbitrary code execution)

Several memory safety and script safety bugs have been found in Firefox
before 74 and Firefox ESR before 68.6. Some of these bugs showed
evidence of memory corruption or escalation of privilege and Mozilla
presumes that with enough effort some of these could have been
exploited to run arbitrary code.

• CVE-2020-6815 (arbitrary code execution)

Several memory safety and script safety bugs have been found in Firefox
before 74. Some of these bugs showed evidence of memory corruption or
escalation of privilege and Mozilla presumes that with enough effort
some of these could have been exploited to run arbitrary code.

Impact

A remote attacker might be able to access sensitive information, bypass
security restrictions and execute arbitrary code and commands on the
affected host.

References

https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2019-20503
https://bugzilla.mozilla.org/show_bug.cgi?id=1613765
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6805
https://bugzilla.mozilla.org/show_bug.cgi?id=1610880
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6806
https://bugzilla.mozilla.org/show_bug.cgi?id=1612308
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6807
https://bugzilla.mozilla.org/show_bug.cgi?id=1614971
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6808
https://bugzilla.mozilla.org/show_bug.cgi?id=1247968
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6809
https://bugzilla.mozilla.org/show_bug.cgi?id=1420296
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6810
https://bugzilla.mozilla.org/show_bug.cgi?id=1432856
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6811
https://bugzilla.mozilla.org/show_bug.cgi?id=1607742
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6812
https://bugzilla.mozilla.org/show_bug.cgi?id=1616661
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6813
https://bugzilla.mozilla.org/show_bug.cgi?id=1605814
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6814
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1592078%2C1604847%2C1608256%2C1612636%2C1614339
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6815
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1181957%2C1557732%2C1557739%2C1611457%2C1612431
https://security.archlinux.org/CVE-2019-20503
https://security.archlinux.org/CVE-2020-6805
https://security.archlinux.org/CVE-2020-6806
https://security.archlinux.org/CVE-2020-6807
https://security.archlinux.org/CVE-2020-6808
https://security.archlinux.org/CVE-2020-6809
https://security.archlinux.org/CVE-2020-6810
https://security.archlinux.org/CVE-2020-6811
https://security.archlinux.org/CVE-2020-6812
https://security.archlinux.org/CVE-2020-6813
https://security.archlinux.org/CVE-2020-6814
https://security.archlinux.org/CVE-2020-6815