CVE-2020-11793 Use after free in n/a

What is CVE-2020-11793?

CVE-2020-11793 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 17 Apr 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

A use-after-free issue exists in WebKitGTK before 2.28.1 and WPE WebKit before 2.28.1 via crafted web content that allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash).

Weakness: CWE-416

Which versions are affected by CVE-2020-11793?

It affects 5 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Opensuse Leap, Webkitgtk Webkitgtk, Wpewebkit Wpe Webkit.

How do I fix CVE-2020-11793?

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-2020-11793 being exploited?

There is no known exploitation of CVE-2020-11793 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-11793, DSA-4658-1, GHSA-9rmm-vmrf-4wgf, MGASA-2020-0177, UBUNTU-CVE-2020-11793, USN-4331-1.