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Mageia 8 MGASA-2021-0563 Critical: Botan2 Plaintext Recovery Issue

mageia
Calendar Grey December 19, 2021
Dist Mageia Esm H88
The latest botan2 updates rectify a vulnerability in the ElGamal algorithm, which permitted the extraction of plaintext in Mageia systems.
Updated botan2 packages fix security vulnerability: The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, allows plaintext recovery becaus...

Summary

Updated botan2 packages fix security vulnerability:
The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, 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 (CVE-2021-40529).

References

- https://bugs.mageia.org/show_bug.cgi?id=29659

- https://www.cve.org/CVERecord?id=CVE-2021-40529

Topics%20covered

Topics Covered

security advisory critical issue update cryptography plaintext recovery mageia botan2

Resolution

SRPMS

- 8/core/botan2-2.17.3-2.1.mga8

Severity
critical
Lowest
Low
Medium
High
Critical

Publication date: 19 Dec 2021
URL: https://advisories.mageia.org/MGASA-2021-0563.html
Type: security
CVE: CVE-2021-40529

Topics%20covered

Topics Covered

security advisory critical issue update cryptography plaintext recovery mageia botan2

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