[Buildroot] [PATCH] package/botan: add upstream security fix for CVE-2021-40529

[Peter Korsgaard]

>>>>> "Peter" == Peter Korsgaard <peter at korsgaard.com> writes:

 > Fixes the following security issue:
 > - CVE-2021-40529: 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

 > For more details, see the upstream bug and issue writeup:
 > - https://github.com/randombit/botan/pull/2790
 > - https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1

 > Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

Committed to 2021.02.x, 2021.05.x and 2021.08.x, thanks.

-- 
Bye, Peter Korsgaard