CVE-2020-36475

Name	CVE-2020-36475
Description	An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). The calculations performed by mbedtls_mpi_exp_mod are not limited; thus, supplying overly large parameters could lead to denial of service when generating Diffie-Hellman key pairs.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2826-1, DLA-3249-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mbedtls (PTS)	stretch (security), stretch (lts), stretch	2.4.2-1+deb9u4	fixed
	buster (security), buster, buster (lts)	2.16.9-0~deb10u1	fixed
	bullseye	2.16.9-0.1	fixed
	bookworm	2.28.3-1	fixed
	trixie	2.28.8-1	fixed
	sid	3.6.2-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
mbedtls	source	stretch	2.4.2-1+deb9u4	DLA-2826-1
mbedtls	source	buster	2.16.9-0~deb10u1	DLA-3249-1
mbedtls	source	(unstable)	2.16.9-0.1

https://github.com/ARMmbed/mbedtls/commit/9246d041500b96fb0694cbda1d833e420696827e