|Description||A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This vulnerability affects Firefox < 68.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
|NVD severity||medium (attack range: remote)|
Vulnerable and fixed packages
The table below lists information on source packages.
|stretch (security), stretch||2:3.26.2-1.1+deb9u1||vulnerable|
The information below is based on the following data on fixed versions.
|Package||Type||Release||Fixed Version||Urgency||Origin||Debian Bugs|
[jessie] - nss <ignored> (Issue is specific to TLS 1.3 and support was not really complete in 3.26; code has diverged significantly since and applying the fix would be very disruptive)
firefox-esr in older suites than buster use the embedded copy and thus issue
is just fixed by updating firefox-esr to 60.8.0. For the others an update to
src:nss is needed as firefox-esr uses the system library.