PT-2021-5403 · Mozilla+7 · Firefox Esr+9

Andrew Mccreight

+2

·

Published

2021-11-02

·

Updated

2023-09-22

·

CVE-2021-43534

CVSS v2.0

9.3

High

VectorAV:N/AC:M/Au:N/C:C/I:C/A:C
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 94 Thunderbird versions prior to 91.3 Firefox ESR versions prior to 91.3
Description The issue is related to a buffer overflow in memory, which could allow a remote attacker to execute arbitrary code. Memory safety bugs were found in Firefox 93 and Firefox ESR 91.2, showing evidence of memory corruption. It is presumed that these bugs could be exploited with enough effort.
Recommendations For Firefox versions prior to 94, update to version 94 or later. For Thunderbird versions prior to 91.3, update to version 91.3 or later. For Firefox ESR versions prior to 91.3, update to version 91.3 or later.

Exploit

Fix

Memory Corruption

Found an issue in the description? Have something to add? Feel free to write us 👾
dbugs@ptsecurity.com

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2021-3215
ALT-PU-2021-3226
ALT-PU-2021-3259
ALT-PU-2021-3370
ALT-PU-2021-3391
ALT-PU-2022-1783
ALT-PU-2022-2458
ALT-PU-2022-2929
ALT-PU-2023-1138
ALT-PU-2023-1139
ALT-PU-2023-4336
ALT-PU-2023-4339
BDU:2021-06242
CESA-2021_4116
CESA-2021_4123
CESA-2021_4130
CESA-2021_4134
CVE-2021-43534
DLA-2863-1
DLA-2874-1
DSA-5026-1
DSA-5034-1
MGASA-2021-0505
MGASA-2021-0506
OESA-2023-1673
OESA-2023-1674
RHSA-2021:4116
RHSA-2021:4123
RHSA-2021:4130
RHSA-2021:4132
RHSA-2021:4133
RHSA-2021:4134
RHSA-2021:4605
RHSA-2021:4607
RHSA-2021_4116
RHSA-2021_4123
RHSA-2021_4130
RHSA-2021_4134
RLSA-2021:4123
RLSA-2021:4130
USN-5248-1

Affected Products

Alt Linux
Astra Linux
Centos
Firefox
Firefox Esr
Linuxmint
Red Hat
Rocky Linux
Thunderbird
Ubuntu