What is CVE-2018-6331?

CVE-2018-6331 is a critical-severity vulnerability in Facebook Buck, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2018-12-31.

How severe is CVE-2018-6331?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-6331 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Facebook Buck

CVE-2018-6331

Buck parser-cache command loads/saves state using Java serialized object. If the state information is maliciously crafted, deserializing it could lead to code execution. This issue affects Buck versions prior to v2018.06.25.01.

Vulnerability class: Insecure Deserialization

EPSS: 0.025 (82.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Facebook Buck — versions v2018.06.25.01, unspecified

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

PalindromeLabs/Java-Deserialization-CVEs

References

cve-assign@fb.com (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-6331?: CVE-2018-6331 is a critical-severity vulnerability in Facebook Buck, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2018-12-31.
How severe is CVE-2018-6331?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-6331 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.