CVE-2021-29967

High

Description

Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. 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. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Mozilla Firefox

PublishedJun 24, 2021

First seenJun 24, 2021

How to fix

Update

mozilla firefox89.0 or later
mozilla firefox_esr78.11 or later
mozilla thunderbird78.11 or later

Vendor advisories

security.gentoo.org/glsa/202208-14

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v < 89.0	89.0
mozilla firefox_esr	v < 78.11	78.11
mozilla thunderbird	v < 78.11	78.11

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