CVE-2020-12457: An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends…

PriorityP334high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

1.53%

72.1th percentile

An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involving more than one in a row, the server becomes stuck in the ProcessReply() loop, i.e., a denial of service.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
debian	wolfssl	< wolfssl 4.5.0+dfsg-1 (bookworm)	wolfssl 4.5.0+dfsg-1 (bookworm)
wolfssl	wolfssl	< 4.5.0	4.5.0
wolfssl	wolfssl	>= 0 < 4.5.0+dfsg-1	4.5.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.5.0+dfsg-1	4.5.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.5.0+dfsg-1	4.5.0+dfsg-1
wolfssl	wolfssl	>= 0 < 4.5.0+dfsg-1	4.5.0+dfsg-1

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

osv7.5HIGH

vendor_debian7.5HIGH

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