libcrypto++: CVE-2021-40530

Debian Bug report logs - #993841
libcrypto++: CVE-2021-40530

Reply or subscribe to this bug.

Toggle useless messages

Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: libcrypto++: CVE-2021-40530

Date: Tue, 07 Sep 2021 08:31:20 +0200

Source: libcrypto++
Version: 8.4.0-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/weidai11/cryptopp/issues/1059
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for libcrypto++.

CVE-2021-40530[0]:
| The ElGamal implementation in Crypto++ through 8.5 allows plaintext
| recovery because, during interaction between two cryptographic
| libraries, a certain dangerous combination of the prime defined by the
| receiver's public key, the generator defined by the receiver's public
| key, and the sender's ephemeral exponents can lead to a cross-
| configuration attack against OpenPGP.


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-2021-40530
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40530
[1] https://github.com/weidai11/cryptopp/issues/1059

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

Send a report that this bug log contains spam.