CVE-2020-36476

NameCVE-2020-36476
DescriptionAn issue was discovered in Mbed TLS before 2.24.0 (and before 2.16.8 LTS and before 2.7.17 LTS). There is missing zeroization of plaintext buffers in mbedtls_ssl_read to erase unused application data from memory.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2826-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mbedtls (PTS)stretch2.4.2-1+deb9u3vulnerable
stretch (security)2.4.2-1+deb9u4fixed
buster2.16.0-1vulnerable
bullseye2.16.9-0.1fixed
bookworm, sid2.28.0-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mbedtlssourcestretch2.4.2-1+deb9u4DLA-2826-1
mbedtlssource(unstable)2.16.9-0.1

Notes

https://github.com/ARMmbed/mbedtls/commit/a321413807927d6e295cec8677733bbde6aeec34 (development)
https://github.com/ARMmbed/mbedtls/commit/ef73875913c66767e7a954aa0b68f42f0756d9b2 (mbedtls-2.7)

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