CVE-2019-16748

CRITICAL

wolfSSL <4.1.0 - Buffer Overflow

Title source: llm

Description

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.

References (1)

[Third Party Advisory] https://github.com/wolfSSL/wolfssl/issues/2459

Scores

CVSS v3 9.8

EPSS 0.0091

EPSS Percentile 75.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-125

Status published

Products (1)

wolfssl/wolfssl < 4.1.0

Published Sep 24, 2019

Tracked Since Feb 18, 2026