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gentooGentoo FoundationGLSA-202011-07
HistoryNov 11, 2020 - 12:00 a.m.

Mozilla Firefox: Remote code execution

2020-11-1100:00:00
Gentoo Foundation
security.gentoo.org
34
mozilla
firefox
remote code execution
javascript jit
arbitrary code
denial of service
upgrade
emerge
open-source web browser.

CVSS2

9.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.916

Percentile

99.0%

JSON

Background

Mozilla Firefox is a popular open-source web browser from the Mozilla project.

Description

Invalid assumptions when emitting the the MCallGetProperty opcode in the JavaScript JIT may result in a use-after-free condition.

Impact

A remote attacker could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All Mozilla Firefox users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-client/firefox-82.0.3"

All Mozilla Firefox (bin) users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose
 ">=www-client/firefox-bin-78.4.1:0/esr78"

All Mozilla Firefox (ESR) users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-client/firefox-82.0.3"

All Mozilla Firefox (ESR) bin users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose
 ">=www-client/firefox-bin-78.4.1:0/esr78"
OSVersionArchitecturePackageVersionFilename
Gentooanyallwww-client/firefox< 82.0.3UNKNOWN
Gentooanyallwww-client/firefox-bin< 78.4.1UNKNOWN

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CVSS2

9.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.916

Percentile

99.0%

JSON
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