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Published: 16 February 2023

The Raccoon attack is a timing attack on DHE ciphersuites inherit in the TLS specification. To mitigate this vulnerability, Firefox disabled support for DHE ciphersuites.


nss doesn't reuse DHE keys, but does reuse ECDHE keys, which is
not problematic for the moment. See page 13 of
and the nss release notes for 3.17:
Since 3.17 includes a way to disable ECDHE key reuse with the
SSL_REUSE_SERVER_ECDHE_KEY option, marking this CVE as fixed in
fixed in 3.17.



Cvss 3 Severity Score


Score breakdown


Package Release Status
Launchpad, Ubuntu, Debian
bionic Not vulnerable
focal Not vulnerable
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Not vulnerable
jammy Not vulnerable
trusty Not vulnerable

Released (3.17)
xenial Not vulnerable

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N