CVE-2016-2821 Use after free in n/a

What is CVE-2016-2821?

CVE-2016-2821 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 13 Jun 2016. 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 vulnerability in the mozilla::dom::Element class in Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2, when contenteditable mode is enabled, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by triggering deletion of DOM elements that were created in the editor.

Which versions are affected by CVE-2016-2821?

It affects 5 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Mozilla Firefox, Opensuse Leap, Opensuse Opensuse.

How do I fix CVE-2016-2821?

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-2016-2821 being exploited?

There is no known exploitation of CVE-2016-2821 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-2016-2821, GHSA-6f24-v3m3-vf5g, UBUNTU-CVE-2016-2821.