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DebianDEBIAN:DSA-4788-1:13EE2

HistoryNov 10, 2020 - 6:53 p.m.

[SECURITY] [DSA 4788-1] firefox-esr security update

2020-11-1018:53:26

lists.debian.org

mozilla firefox

use-after-free

arbitrary code

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

AI Score

9.1

Confidence

High

EPSS

0.916

Percentile

99.0%

JSON

Debian Security Advisory DSA-4788-1 [email protected]
https://www.debian.org/security/ Moritz Muehlenhoff
November 10, 2020 https://www.debian.org/security/faq

Package : firefox-esr
CVE ID : CVE-2020-26950

A use-after-free was found in the Mozilla Firefox web browser, which
could potentially result in the execution of arbitrary code.

For the stable distribution (buster), this problem has been fixed in
version 78.4.1esr-1~deb10u1.

We recommend that you upgrade your firefox-esr packages.

For the detailed security status of firefox-esr please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/firefox-esr

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

OSVersionArchitecturePackageVersionFilename
Debian9alllightning-l10n-pl< 1:78.4.2-1~deb9u1lightning-l10n-pl_1:78.4.2-1~deb9u1_all.deb
Debian9alliceweasel-l10n-ne-np< 1:78.4.1esr-1~deb9u1iceweasel-l10n-ne-np_1:78.4.1esr-1~deb9u1_all.deb
Debian9alliceowl-l10n-zh-cn< 1:78.4.2-1~deb9u1iceowl-l10n-zh-cn_1:78.4.2-1~deb9u1_all.deb
Debian10alliceweasel-l10n-hr< 1:78.4.1esr-1~deb10u1iceweasel-l10n-hr_1:78.4.1esr-1~deb10u1_all.deb
Debian9allicedove-l10n-ast< 1:78.4.2-1~deb9u1icedove-l10n-ast_1:78.4.2-1~deb9u1_all.deb
Debian9allthunderbird-l10n-hsb< 1:78.4.2-1~deb9u1thunderbird-l10n-hsb_1:78.4.2-1~deb9u1_all.deb
Debian9alllightning-l10n-hu< 1:78.4.2-1~deb9u1lightning-l10n-hu_1:78.4.2-1~deb9u1_all.deb
Debian9allicedove-l10n-ko< 1:78.4.2-1~deb9u1icedove-l10n-ko_1:78.4.2-1~deb9u1_all.deb
Debian9allthunderbird< 1:78.4.2-1~deb9u1thunderbird_1:78.4.2-1~deb9u1_all.deb
Debian10allfirefox-esr-l10n-fr< 78.4.1esr-1~deb10u1firefox-esr-l10n-fr_78.4.1esr-1~deb10u1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	9	all	lightning-l10n-pl	< 1:78.4.2-1~deb9u1	lightning-l10n-pl_1:78.4.2-1~deb9u1_all.deb
Debian	9	all	iceweasel-l10n-ne-np	< 1:78.4.1esr-1~deb9u1	iceweasel-l10n-ne-np_1:78.4.1esr-1~deb9u1_all.deb
Debian	9	all	iceowl-l10n-zh-cn	< 1:78.4.2-1~deb9u1	iceowl-l10n-zh-cn_1:78.4.2-1~deb9u1_all.deb
Debian	10	all	iceweasel-l10n-hr	< 1:78.4.1esr-1~deb10u1	iceweasel-l10n-hr_1:78.4.1esr-1~deb10u1_all.deb
Debian	9	all	icedove-l10n-ast	< 1:78.4.2-1~deb9u1	icedove-l10n-ast_1:78.4.2-1~deb9u1_all.deb
Debian	9	all	thunderbird-l10n-hsb	< 1:78.4.2-1~deb9u1	thunderbird-l10n-hsb_1:78.4.2-1~deb9u1_all.deb
Debian	9	all	lightning-l10n-hu	< 1:78.4.2-1~deb9u1	lightning-l10n-hu_1:78.4.2-1~deb9u1_all.deb
Debian	9	all	icedove-l10n-ko	< 1:78.4.2-1~deb9u1	icedove-l10n-ko_1:78.4.2-1~deb9u1_all.deb
Debian	9	all	thunderbird	< 1:78.4.2-1~deb9u1	thunderbird_1:78.4.2-1~deb9u1_all.deb
Debian	10	all	firefox-esr-l10n-fr	< 78.4.1esr-1~deb10u1	firefox-esr-l10n-fr_78.4.1esr-1~deb10u1_all.deb