CVE-2018-6548 Use after free in n/a

Critical 9.8 Published 2 Feb 2018 Updated 5 Aug 2024

A use-after-free vulnerability in libwebm allows attackers to cause denial of service or potentially execute arbitrary code via crafted WebM files.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-6548?

CVE-2018-6548 is a critical use after free vulnerability in n/a, published on 2 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A use-after-free issue was discovered in libwebm through 2018-02-02. If a Vp9HeaderParser was initialized once before, its property frame_ would not be changed because of code in vp9parser::Vp9HeaderParser::SetFrame. Its frame_ could be freed while the corresponding pointer would not be updated, leading to a dangling pointer. This is related to the function OutputCluster in webm_info.cc.

Weakness: CWE-416

Which versions are affected by CVE-2018-6548?

It affects 1 product.

Products include Webmproject Libwebm.

How do I fix CVE-2018-6548?

No fix has been published for CVE-2018-6548 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-2018-6548 being exploited?

There is no known exploitation of CVE-2018-6548 in the wild and no public exploit code.

Sources

Also known as GHSA-wfwr-mmpm-892c, UBUNTU-CVE-2018-6548.