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cve[email protected]CVE-2021-40528
HistorySep 06, 2021 - 7:15 p.m.

CVE-2021-40528

2021-09-0619:15:07
CWE-327
[email protected]
web.nvd.nist.gov
233
2
cve-2021-40528
libgcrypt
elgamal
plaintext recovery
cryptographic libraries
nvd

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

5.7 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

57.7%

JSON

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.

Affected configurations

NVD
Node
gnupglibgcryptRange<1.9.4
CPENameOperatorVersion
gnupg:libgcryptgnupg libgcryptlt1.9.4

Social References

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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

5.7 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

57.7%

JSON
Related for CVE-2021-40528
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