CVE-2022-30629: Session tickets lack random ticket_age_add in crypto/tls

Severity: low (CVSS 3.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-08-10 · updated 2026-06-17
Weakness: CWE-330

Description

Non-random values for ticket_age_add in session tickets in crypto/tls before Go 1.17.11 and Go 1.18.3 allow an attacker that can observe TLS handshakes to correlate successive connections by comparing ticket ages during session resumption.

Affected products

Go: before 1.17.11; from 1.18.0 before 1.18.3 — fixed in 1.17.11, 1.18.3

How to fix

Upgrade to a fixed version: Go 1.17.11, 1.18.3. Check the vendor advisory for mitigations.

References

https://go.dev/cl/405994
https://go.dev/issue/52814
https://go.googlesource.com/go/+/fe4de36198794c447fbd9d7cc2d7199a506c76a5
https://groups.google.com/g/golang-announce/c/TzIC9-t8Ytg/m/IWz5T6x7AAAJ
https://pkg.go.dev/vuln/GO-2022-0531
https://go.dev/cl/405994
https://go.dev/issue/52814
https://go.googlesource.com/go/+/fe4de36198794c447fbd9d7cc2d7199a506c76a5
https://groups.google.com/g/golang-announce/c/TzIC9-t8Ytg/m/IWz5T6x7AAAJ
https://pkg.go.dev/vuln/GO-2022-0531

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