PT-2019-14809 · Wolfssl · Wolfssl

Flyroom · Published 2019-09-24 · Updated 2019-09-24 · CVE-2019-16748

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions wolfSSL versions prior to 4.1.0

Description The issue is related to a missing sanity check of memory accesses in parsing ASN.1 certificate data while handshaking, resulting in a one-byte heap-based buffer over-read. This occurs in the CheckCertSignature ex function in wolfcrypt/src/asn.c.

Recommendations For versions prior to 4.1.0, update to version 4.1.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the CheckCertSignature ex function in wolfcrypt/src/asn.c until a patch is available.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2019-16748

Affected Products

Wolfssl

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2019-16748 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-16748 · Security Note
• https://osv.dev/vulnerability/CVE-2019-16748 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-16748 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-16748 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-16748 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-16748 · Vendor Advisory
• https://github.com/wolfSSL/wolfssl/issues/2459 · Note