CVE-2019-3565

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-06 · updated 2026-06-17
Weakness: CWE-834

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.

Affected products

Facebook Thrift: before 2019.05.06.00 — fixed in 2019.05.06.00

How to fix

Upgrade to a fixed version: Facebook Thrift 2019.05.06.00. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/108280
https://github.com/facebook/fbthrift/commit/01686e15ec77ccb4d49a77d5bce3a01601e54d64
https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
https://www.facebook.com/security/advisories/cve-2019-3565
http://www.securityfocus.com/bid/108280
https://github.com/facebook/fbthrift/commit/01686e15ec77ccb4d49a77d5bce3a01601e54d64
https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
https://www.facebook.com/security/advisories/cve-2019-3565

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