Description
Large handshake records may cause panics in crypto/tls. Both clients and servers may send large TLS handshake records which cause servers and clients, respectively, to panic when attempting to construct responses. This affects all TLS 1.3 clients, TLS 1.2 clients which explicitly enable session resumption (by setting Config.ClientSessionCache to a non-nil value), and TLS 1.3 servers which request client certificates (by setting Config.ClientAuth >= RequestClientCert).
References (5)
Core 5
Core References
Patch, Release Notes
https://go.dev/cl/468125
Issue Tracking, Patch, Vendor Advisory
https://go.dev/issue/58001
Mailing List, Vendor Advisory
https://groups.google.com/g/golang-announce/c/V0aBFqaFs_E
Vendor Advisory
https://pkg.go.dev/vuln/GO-2023-1570
Third Party Advisory
https://security.gentoo.org/glsa/202311-09
Scores
CVSS v3
7.5
EPSS
0.0002
EPSS Percentile
5.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-400
Status
published
Products (2)
golang/go
1.20.0 (4 CPE variants)
golang/go
< 1.19.6
Published
Feb 28, 2023
Tracked Since
Feb 18, 2026