VDB
CVE-2021-40530
CVE-2021-40530
PUBLISHED
CVSS 5.900000095367432 MEDIUM
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.
EPSS 0.26% · 49.3th percentile
Risk Scores
CVSS 3.1
5.900000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score
0.26%
49.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| fedoraproject | fedora | 33, 35, 34 |
| cryptopp | crypto\+\+ | 0 |
| n/a | n/a | n/a |
Timeline
- Sep 6, 2021 CVE Published
- Sep 7, 2021 EPSS Score
- Oct 5, 2021 EPSS Score
- Oct 6, 2021 EPSS Score
- Nov 4, 2021 EPSS Score
- Jan 1, 2022 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Apr 26, 2022 EPSS Score
- Jun 23, 2022 EPSS Score
- Aug 21, 2022 EPSS Score
References
- https://eprint.iacr.org/2021/923 url
- https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1 url
- https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2 url
- FEDORA-2021-8b14da0538 vendor-advisory
- FEDORA-2021-a381a721a9 vendor-advisory
- FEDORA-2021-6788250ea4 vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-40530 advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/57OJA2K5AHX5HAU2QBDRWLGIIUX7GASC url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HGVBZ2TTRKCTYAZTRHTF6OBD4W37F5MT url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VJYOZGWI7TD27SEXILSM6VUTPPEICDL7 url