CVE-2019-11921 Memory corruption in Proxygen

Critical 9.8 Published 25 Jul 2019 Updated 4 Aug 2024

An out-of-bounds write in Proxygen allows attackers to execute code or cause denial of service via crafted packets in specific configurations.

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-2019-11921?

CVE-2019-11921 is a critical memory corruption vulnerability in Facebook Proxygen, published on 25 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An out of bounds write is possible via a specially crafted packet in certain configurations of Proxygen due to improper handling of Base64 when parsing malformed binary content in Structured HTTP Headers. This issue affects versions of proxygen prior to v2019.07.22.00.

Weakness: CWE-787

Which versions are affected by CVE-2019-11921?

It affects 1 product.

Products include Facebook Proxygen.

How do I fix CVE-2019-11921?

No fix has been published for CVE-2019-11921 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-11921 being exploited?

There is no known exploitation of CVE-2019-11921 in the wild and no public exploit code.

Sources

Also known as GHSA-87xc-5jfw-gv68.