CVE-2021-40528
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.9epss 1.4%
exploitation probability
1.4%top 29% of all CVEs
observed exploitation
nono source reports it
The ElGamal implementation in Libgcrypt before 1.9.4 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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
n/a · n/aReferences
https://eprint.iacr.org/2021/923https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=3462280f2e23e16adf3ed5176e0f2413d8861320https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2https://security.gentoo.org/glsa/202210-13