CVE-2017-12780 Use after free in n/a

Medium 6.5 Published 9 Nov 2017 Updated 5 Aug 2024

Remote attackers can cause a denial of service via a crafted MKV file due to an invalid free in libebml2.

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: None listed

What is CVE-2017-12780?

CVE-2017-12780 is a medium-severity use after free vulnerability in n/a, published on 9 Nov 2017. 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

The ReadData function in ebmlstring.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of service (invalid free and application crash) via a crafted mkv file.

Weakness: CWE-416

Which versions are affected by CVE-2017-12780?

It affects 3 products.

Products include Matroska Libebml2, Matroska Mkclean, Matroska Mkvalidator.

How do I fix CVE-2017-12780?

No fix has been published for CVE-2017-12780 yet. Limit exposure of the affected software until one is available.

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-2017-12780 being exploited?

There is no known exploitation of CVE-2017-12780 in the wild and no public exploit code.

Sources

Also known as GHSA-c58v-vgcm-vhfg.