What is CVE-2019-16748?

CVE-2019-16748 is a critical-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-09-24.

How severe is CVE-2019-16748?

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

Is CVE-2019-16748 known to be exploited?

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

Out-of-bounds Read in Wolfssl

CVE-2019-16748

In wolfSSL through 4.1.0, there is a missing sanity check of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer over-read in CheckCertSignature_ex in wolfcrypt/src/asn.c.

Vulnerability class: Buffer Overflow

EPSS: 0.012 (63.7th 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

Wolfssl
N/a — versions n/a

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-16748?: CVE-2019-16748 is a critical-severity vulnerability in Wolfssl, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-09-24.
How severe is CVE-2019-16748?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-16748 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.