2.6 Low
CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:H/Au:N/C:P/I:N/A:N
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
0.002 Low
EPSS
Percentile
54.3%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | libcrypto++ | < any | UNKNOWN |
ubuntu | 20.04 | noarch | libcrypto++ | < any | UNKNOWN |
ubuntu | 22.04 | noarch | libcrypto++ | < any | UNKNOWN |
ubuntu | 23.10 | noarch | libcrypto++ | < any | UNKNOWN |
ubuntu | 24.04 | noarch | libcrypto++ | < any | UNKNOWN |
ubuntu | 14.04 | noarch | libcrypto++ | < any | UNKNOWN |
ubuntu | 16.04 | noarch | libcrypto++ | < any | UNKNOWN |
eprint.iacr.org/2021/923
github.com/weidai11/cryptopp/issues/1059
ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
launchpad.net/bugs/cve/CVE-2021-40530
nvd.nist.gov/vuln/detail/CVE-2021-40530
security-tracker.debian.org/tracker/CVE-2021-40530
www.cve.org/CVERecord?id=CVE-2021-40530
2.6 Low
CVSS2
Attack Vector
NETWORK
Attack Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:H/Au:N/C:P/I:N/A:N
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
0.002 Low
EPSS
Percentile
54.3%