What is CVE-2019-11921?

CVE-2019-11921 is a critical-severity vulnerability in Facebook Proxygen, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-07-25.

How severe is CVE-2019-11921?

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

Buffer overflow in Facebook Proxygen

CVE-2019-11921

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 pro…

Vulnerability class: Buffer Overflow

EPSS: 0.021 (79.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Facebook Proxygen — versions v2019.07.22.00, unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2019-11921?: CVE-2019-11921 is a critical-severity vulnerability in Facebook Proxygen, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-07-25.
How severe is CVE-2019-11921?: Critical severity. CVSS v3 base score is 9.8 out of 10.