CVE-2020-36475

NameCVE-2020-36475
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2826-1, DLA-3249-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mbedtls (PTS)bullseye2.16.9-0.1fixed
bookworm2.28.3-1fixed
sid, trixie2.28.8-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mbedtlssourcestretch2.4.2-1+deb9u4DLA-2826-1
mbedtlssourcebuster2.16.9-0~deb10u1DLA-3249-1
mbedtlssource(unstable)2.16.9-0.1

Notes

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

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