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Bug 755170 (CVE-2020-16012, CVE-2020-26951, CVE-2020-26953, CVE-2020-26956, CVE-2020-26958, CVE-2020-26959, CVE-2020-26960, CVE-2020-26961, CVE-2020-26965, CVE-2020-26968, MFSA-2020-51) - <www-client/firefox{,-bin}-{78.5.0, 83}: Multiple vulnerabilities (MFSA-2020-51)
Summary: <www-client/firefox{,-bin}-{78.5.0, 83}: Multiple vulnerabilities (MFSA-2020-51)
Status: RESOLVED FIXED
Alias: CVE-2020-16012, CVE-2020-26951, CVE-2020-26953, CVE-2020-26956, CVE-2020-26958, CVE-2020-26959, CVE-2020-26960, CVE-2020-26961, CVE-2020-26965, CVE-2020-26968, MFSA-2020-51
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal major (vote)
Assignee: Gentoo Security
URL: https://www.mozilla.org/en-US/securit...
Whiteboard: A2 [glsa+ cve]
Keywords: CC-ARCHES
Depends on:
Blocks:
 
Reported: 2020-11-17 22:14 UTC by Sam James
Modified: 2020-12-07 00:37 UTC (History)
1 user (show)

See Also:
Package list:
www-client/firefox-78.5.0
Runtime testing required: ---
nattka: sanity-check+


Attachments

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Description Sam James archtester gentoo-dev Security 2020-11-17 22:14:46 UTC
* CVE-2020-26951

Description:
"A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer."


* CVE-2020-16012

Description:
"When drawing a transparent image on top of an unknown cross-origin image, the Skia library drawImage function took a variable amount of time depending on the content of the underlying image. This resulted in potential cross-origin information exposure of image content through timing side-channel attacks."


* CVE-2020-26953

Description:
"It was possible to cause the browser to enter fullscreen mode without displaying the security UI; thus making it possible to attempt a phishing attack or otherwise confuse the user."


* CVE-2020-26956

Description:
"In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS."

* CVE-2020-26958

Description:
"Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass."


* CVE-2020-26959

Description:
"During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash."


* CVE-2020-26960

Description:
"If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash."

* CVE-2020-26961

Description:
"When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack."


* CVE-2020-26965

Description:
"Some websites have a feature "Show Password" where clicking a button will change a password field into a textbook field, revealing the typed password. If, when using a software keyboard that remembers user input, a user typed their password and used that feature, the type of the password field was changed, resulting in a keyboard layout change and the possibility for the software keyboard to remember the typed password."


* CVE-2020-26968

Description:
"Mozilla developers Steve Fink, Jason Kratzer, Randell Jesup, Christian Holler, and Byron Campen reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. 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."
Comment 1 NATTkA bot gentoo-dev 2020-11-17 22:16:49 UTC
Unable to check for sanity:

> no match for package: www-client/firefox-8.5.0
Comment 2 NATTkA bot gentoo-dev 2020-11-17 22:40:53 UTC
All sanity-check issues have been resolved
Comment 3 Sam James archtester gentoo-dev Security 2020-11-19 00:20:32 UTC
arm64 done

all arches done
Comment 4 Larry the Git Cow gentoo-dev 2020-11-19 00:33:38 UTC
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=98afb81c74eae75712153527f6980e1b02a4a715

commit 98afb81c74eae75712153527f6980e1b02a4a715
Author:     Thomas Deutschmann <whissi@gentoo.org>
AuthorDate: 2020-11-19 00:33:30 +0000
Commit:     Thomas Deutschmann <whissi@gentoo.org>
CommitDate: 2020-11-19 00:33:30 +0000

    www-client/firefox-bin: security cleanup
    
    Bug: https://bugs.gentoo.org/755170
    Package-Manager: Portage-3.0.9, Repoman-3.0.2
    Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>

 www-client/firefox-bin/Manifest                  | 194 -----------
 www-client/firefox-bin/firefox-bin-78.4.1.ebuild | 411 -----------------------
 www-client/firefox-bin/firefox-bin-82.0.3.ebuild | 411 -----------------------
 3 files changed, 1016 deletions(-)

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f958b3aed74aa73666f364c7fad9864abded41e2

commit f958b3aed74aa73666f364c7fad9864abded41e2
Author:     Thomas Deutschmann <whissi@gentoo.org>
AuthorDate: 2020-11-19 00:33:04 +0000
Commit:     Thomas Deutschmann <whissi@gentoo.org>
CommitDate: 2020-11-19 00:33:04 +0000

    www-client/firefox: security cleanup
    
    Bug: https://bugs.gentoo.org/755170
    Package-Manager: Portage-3.0.9, Repoman-3.0.2
    Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>

 www-client/firefox/Manifest              |  194 ------
 www-client/firefox/firefox-78.4.1.ebuild | 1120 ------------------------------
 www-client/firefox/firefox-82.0.3.ebuild | 1120 ------------------------------
 3 files changed, 2434 deletions(-)
Comment 5 GLSAMaker/CVETool Bot gentoo-dev 2020-12-07 00:37:38 UTC
This issue was resolved and addressed in
 GLSA 202012-03 at https://security.gentoo.org/glsa/202012-03
by GLSA coordinator Thomas Deutschmann (whissi).