What is CVE-2023-23759?

CVE-2023-23759 is a high-severity vulnerability in Facebook Fizz, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2023-05-18.

How severe is CVE-2023-23759?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Facebook Fizz

CVE-2023-23759

There is a vulnerability in the fizz library prior to v2023.01.30.00 where a CHECK failure can be triggered remotely. This behavior requires the client supported cipher advertisement changing between the original ClientHello and the second ClientHello, crashing the process (impact is limited to denial of service).

EPSS: 0.007 (50.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Facebook Fizz — versions v0.0.0.0

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

cve-assign@fb.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
cve-assign@fb.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2023-23759?: CVE-2023-23759 is a high-severity vulnerability in Facebook Fizz, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2023-05-18.
How severe is CVE-2023-23759?: High severity. CVSS v3 base score is 7.5 out of 10.