| 1 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 2 |
Gentoo Linux Security Advisory GLSA 202011-07 |
| 3 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 4 |
https://security.gentoo.org/ |
| 5 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 |
|
| 7 |
Severity: Normal |
| 8 |
Title: Mozilla Firefox: Remote code execution |
| 9 |
Date: November 11, 2020 |
| 10 |
Bugs: #753773 |
| 11 |
ID: 202011-07 |
| 12 |
|
| 13 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 14 |
|
| 15 |
Synopsis |
| 16 |
======== |
| 17 |
|
| 18 |
A use-after-free in Mozilla Firefox might allow remote attacker(s) to |
| 19 |
execute arbitrary code. |
| 20 |
|
| 21 |
Background |
| 22 |
========== |
| 23 |
|
| 24 |
Mozilla Firefox is a popular open-source web browser from the Mozilla |
| 25 |
project. |
| 26 |
|
| 27 |
Affected packages |
| 28 |
================= |
| 29 |
|
| 30 |
------------------------------------------------------------------- |
| 31 |
Package / Vulnerable / Unaffected |
| 32 |
------------------------------------------------------------------- |
| 33 |
1 www-client/firefox < 82.0.3 >= 78.4.1:0/esr78 |
| 34 |
>= 82.0.3 |
| 35 |
2 www-client/firefox-bin < 78.4.1 >= 78.4.1:0/esr78 |
| 36 |
>= 82.0.3 |
| 37 |
------------------------------------------------------------------- |
| 38 |
2 affected packages |
| 39 |
|
| 40 |
Description |
| 41 |
=========== |
| 42 |
|
| 43 |
Invalid assumptions when emitting the the MCallGetProperty opcode in |
| 44 |
the JavaScript JIT may result in a use-after-free condition. |
| 45 |
|
| 46 |
Impact |
| 47 |
====== |
| 48 |
|
| 49 |
A remote attacker could possibly execute arbitrary code with the |
| 50 |
privileges of the process, or cause a Denial of Service condition. |
| 51 |
|
| 52 |
Workaround |
| 53 |
========== |
| 54 |
|
| 55 |
There is no known workaround at this time. |
| 56 |
|
| 57 |
Resolution |
| 58 |
========== |
| 59 |
|
| 60 |
All Mozilla Firefox users should upgrade to the latest version: |
| 61 |
|
| 62 |
# emerge --sync |
| 63 |
# emerge --ask --oneshot --verbose ">=www-client/firefox-82.0.3" |
| 64 |
|
| 65 |
All Mozilla Firefox (bin) users should upgrade to the latest version: |
| 66 |
|
| 67 |
# emerge --sync |
| 68 |
# emerge --ask --oneshot -v ">=www-client/firefox-bin-78.4.1:0/esr78" |
| 69 |
|
| 70 |
All Mozilla Firefox (ESR) users should upgrade to the latest version: |
| 71 |
|
| 72 |
# emerge --sync |
| 73 |
# emerge --ask --oneshot --verbose ">=www-client/firefox-82.0.3" |
| 74 |
|
| 75 |
All Mozilla Firefox (ESR) bin users should upgrade to the latest |
| 76 |
version: |
| 77 |
|
| 78 |
# emerge --sync |
| 79 |
# emerge --ask --oneshot -v ">=www-client/firefox-bin-78.4.1:0/esr78" |
| 80 |
|
| 81 |
References |
| 82 |
========== |
| 83 |
|
| 84 |
[ 1 ] CVE-2020-26950 |
| 85 |
https://nvd.nist.gov/vuln/detail/CVE-2020-26950 |
| 86 |
[ 2 ] MFSA-2020-49 |
| 87 |
https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/ |
| 88 |
|
| 89 |
Availability |
| 90 |
============ |
| 91 |
|
| 92 |
This GLSA and any updates to it are available for viewing at |
| 93 |
the Gentoo Security Website: |
| 94 |
|
| 95 |
https://security.gentoo.org/glsa/202011-07 |
| 96 |
|
| 97 |
Concerns? |
| 98 |
========= |
| 99 |
|
| 100 |
Security is a primary focus of Gentoo Linux and ensuring the |
| 101 |
confidentiality and security of our users' machines is of utmost |
| 102 |
importance to us. Any security concerns should be addressed to |
| 103 |
security@g.o or alternatively, you may file a bug at |
| 104 |
https://bugs.gentoo.org. |
| 105 |
|
| 106 |
License |
| 107 |
======= |
| 108 |
|
| 109 |
Copyright 2020 Gentoo Foundation, Inc; referenced text |
| 110 |
belongs to its owner(s). |
| 111 |
|
| 112 |
The contents of this document are licensed under the |
| 113 |
Creative Commons - Attribution / Share Alike license. |
| 114 |
|
| 115 |
https://creativecommons.org/licenses/by-sa/2.5 |
Archives