CVE-2020-15522

NameCVE-2020-15522
DescriptionBouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.
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)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bouncycastle (PTS)stretch1.56-1+deb9u2vulnerable
stretch (security)1.56-1+deb9u3vulnerable
buster1.60-1vulnerable
bullseye1.68-2fixed
bookworm, sid1.68-4fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bouncycastlesource(unstable)1.68-1

Notes

[buster] - bouncycastle <no-dsa> (Minor issue)
[stretch] - bouncycastle <no-dsa> (Minor issue)
https://github.com/bcgit/bc-java/wiki/CVE-2020-15522

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