|Description||A Bleichenbacher type side-channel based padding oracle attack was found in the way nettle handles endian conversion of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run a process on the same physical core as the victim process, could use this flaw extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.|
|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||low (attack range: local)|
Vulnerable and fixed packages
The table below lists information on source packages.
|bullseye, sid, buster||3.4.1-1||fixed|
The information below is based on the following data on fixed versions.
|Package||Type||Release||Fixed Version||Urgency||Origin||Debian Bugs|
[stretch] - nettle <no-dsa> (Minor issue)
[jessie] - nettle <no-dsa> (Minor issue - https://lists.debian.org/debian-lts/2019/03/msg00021.html)
The upstream correction also makes a new public function that packages using
nettle should use. This means that fixing this CVE is a pre-requisite for
fixing other CVEs like CVE-2018-16868.