CVE-2021-43398

Name	CVE-2021-43398
Description	Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks.
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	medium
Debian Bugs	1000227

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libcrypto++ (PTS)	stretch	5.6.4-7	vulnerable
	buster	5.6.4-8	vulnerable
	bullseye	8.4.0-1	vulnerable
	bookworm, sid	8.6.0-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libcrypto++	source	(unstable)	(unfixed)			1000227

Notes

[bullseye] - libcrypto++ <no-dsa> (Minor issue)
[buster] - libcrypto++ <no-dsa> (Minor issue)
[stretch] - libcrypto++ <no-dsa> (Minor issue)
https://github.com/weidai11/cryptopp/issues/1080