CVE-2018-16869

Name	CVE-2018-16869
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.

Source Package	Release	Version	Status
nettle (PTS)	jessie	2.7.1-5+deb8u2	vulnerable
	stretch	3.3-1	vulnerable
	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
nettle	source	(unstable)	3.4.1~rc1-1	low

Notes

[stretch] - nettle <no-dsa> (Minor issue)
[jessie] - nettle <no-dsa> (Minor issue - https://lists.debian.org/debian-lts/2019/03/msg00021.html)
http://cat.eyalro.net/
https://lists.lysator.liu.se/pipermail/nettle-bugs/2018/007363.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.