CVE-2020-6509 Use after free in Chrome

Critical 9.6 Published 22 Jul 2020 Updated 4 Aug 2024

A use-after-free flaw in Chrome extensions allows attackers to escape the sandbox via a malicious extension, requiring user installation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2020-6509?

CVE-2020-6509 is a critical use after free vulnerability in Google Chrome, published on 22 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Use after free in extensions in Google Chrome prior to 83.0.4103.116 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.

Weakness: CWE-416

Which versions are affected by CVE-2020-6509?

It affects 1 product.

Linux distribution packages (7)

`chromium-browser` Red Hat:rhel_extras:6	All versions	`0:83.0.4103.116-1.el6_10`
`chromium-browser-debuginfo` Red Hat:rhel_extras:6	All versions	`0:83.0.4103.116-1.el6_10`
`chromium` SUSE:Package Hub 15 SP1	All versions	`83.0.4103.116-bp151.3.91.1`
`chromium` SUSE:Package Hub 15 SP2	All versions	`83.0.4103.116-bp152.2.3.1`
`chromium` openSUSE:Leap 15.1	All versions	`83.0.4103.116-lp151.2.106.1`
`opera` openSUSE:Leap 15.1 NonFree	All versions	`69.0.3686.49-lp151.2.21.1`
`opera` openSUSE:Leap 15.2 NonFree	All versions	`69.0.3686.49-lp152.2.9.1`

Products include Google Chrome.

How do I fix CVE-2020-6509?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2020-6509 being exploited?

There is no known exploitation of CVE-2020-6509 in the wild and no public exploit code.

All Google Chrome vulnerabilities

Sources

Also known as DEBIAN-CVE-2020-6509, GHSA-jv2p-68ph-w4mw, RHSA-2020:2761, UBUNTU-CVE-2020-6509, openSUSE-SU-2020:0887-1, openSUSE-SU-2020:0902-1 and 3 more.