CVE-2015-8789 Use after free in n/a

Critical 9.6 Published 29 Jan 2016 Updated 6 Aug 2024

A use-after-free flaw in libEBML allows attackers to cause denial of service or potentially execute code via crafted EBML documents.

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-2015-8789?

CVE-2015-8789 is a critical use after free vulnerability in n/a, published on 29 Jan 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 EbmlMaster::Read function in libEBML before 1.3.3 allows context-dependent attackers to have unspecified impact via a "deeply nested element with infinite size" followed by another element of an upper level in an EBML document.

Which versions are affected by CVE-2015-8789?

It affects 1 product.

Products include Matroska Libebml.

How do I fix CVE-2015-8789?

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-2015-8789 being exploited?

There is no known exploitation of CVE-2015-8789 in the wild and no public exploit code.

Sources

Also known as CVE-2016-1515, DEBIAN-CVE-2015-8789, GHSA-h7v7-5ph3-4v3p, UBUNTU-CVE-2015-8789.