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…

PriorityP337critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

1.15%

63.4th percentile

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
debian	wolfssl	< wolfssl 4.2.0+dfsg-1 (bookworm)	wolfssl 4.2.0+dfsg-1 (bookworm)
wolfssl	wolfssl	<= 4.1.0	—
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.2.0+dfsg-1	4.2.0+dfsg-1

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

osv9.8CRITICAL

vendor_debian9.8CRITICAL

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