DEBIAN-CVE-2021-40528

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Source
https://security-tracker.debian.org/tracker/CVE-2021-40528
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-40528.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-40528
Upstream
Published
2021-09-06T19:15:07Z
Modified
2025-09-25T22:40:30Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / libgcrypt20

Package

Name
libgcrypt20
Purl
pkg:deb/debian/libgcrypt20?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.7-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / libgcrypt20

Package

Name
libgcrypt20
Purl
pkg:deb/debian/libgcrypt20?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.7-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / libgcrypt20

Package

Name
libgcrypt20
Purl
pkg:deb/debian/libgcrypt20?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.7-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / libgcrypt20

Package

Name
libgcrypt20
Purl
pkg:deb/debian/libgcrypt20?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.8.7-6

Ecosystem specific 

{
    "urgency": "not yet assigned"
}