CVE-2019-3565 Denial of service in Facebook Thrift
Malicious clients can cause denial of service in legacy C++ Facebook Thrift servers by sending messages with unknown field types that take excessive time to parse.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-3565?
CVE-2019-3565 is a high-severity denial of service vulnerability in Facebook Thrift, published on 6 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Legacy C++ Facebook Thrift servers (using cpp instead of cpp2) would not error upon receiving messages with containers of fields of unknown type. As a result, malicious clients could send short messages which would take a long time for the server to parse, potentially leading to denial of service. This issue affects Facebook Thrift prior to v2019.05.06.00.
Which versions are affected by CVE-2019-3565?
It affects 1 product.
Products include Facebook Thrift.
How do I fix CVE-2019-3565?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-3565 being exploited?
There is no known exploitation of CVE-2019-3565 in the wild and no public exploit code.
Other vulnerabilities in Facebook Thrift
Sources
Also known as CLSA-2026-1774916752, CLSA-2026-1775003187, GHSA-j98f-h9mx-xrxq, UBUNTU-CVE-2019-3565.