CVE-2019-16748

CRITICAL

wolfssl < 4.1.0 - Out-of-bounds Read in ASN.1 Certificate Parsing

Title source: llm
STIX 2.1

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)

Core 1
Core References
Third Party Advisory x_refsource_misc
https://github.com/wolfSSL/wolfssl/issues/2459

Scores

CVSS v3 9.8
EPSS 0.0115
EPSS Percentile 63.2%
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