CVE-2021-3336: DoTls13CertificateVerify in tls13.c in wolfSSL before 4.7.0 does not cease processing for certain anomalous peer behavior (sending an ED22519, ED448, ECC, or…

PriorityP338high8.1CVSS 3.1

AVNACHPRNUINSUCHIHAH

EPSS

0.79%

52.2th percentile

DoTls13CertificateVerify in tls13.c in wolfSSL before 4.7.0 does not cease processing for certain anomalous peer behavior (sending an ED22519, ED448, ECC, or RSA signature without the corresponding certificate). The client side is affected because man-in-the-middle attackers can impersonate TLS 1.3 servers.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
debian	wolfssl	< wolfssl 4.6.0-3 (bookworm)	wolfssl 4.6.0-3 (bookworm)
wolfssl	wolfssl	< 4.7.0	4.7.0
wolfssl	wolfssl	>= 0 < 4.6.0-3	4.6.0-3
wolfssl	wolfssl	>= 0 < 4.6.0-3	4.6.0-3
wolfssl	wolfssl	>= 0 < 4.6.0-3	4.6.0-3
wolfssl	wolfssl	>= 0 < 4.6.0-3	4.6.0-3

CVSS provenance

nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

osv8.1HIGH

vendor_debian8.1HIGH

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.