Source: libcrypto++
Version: 8.6.0-2
Severity: important
Tags: security upstream
Forwarded: https://github.com/weidai11/cryptopp/issues/1080
X-Debbugs-Cc: car...@debian.org, Debian Security Team <t...@security.debian.org>

Hi,

The following vulnerability was published for libcrypto++. Filling
this bug mainly for tracking downstream the upstream issue (to date
not yet answered upstream).

CVE-2021-43398[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-43398
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43398
[1] https://github.com/weidai11/cryptopp/issues/1080

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

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