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CVE
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CVE-2021-33560Date: (C)2021-06-09   (M)2023-12-22


Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.5CVSS Score : 5.0
Exploit Score: 3.9Exploit Score: 10.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: HIGHAvailability: NONE
Integrity: NONE 
Availability: NONE 
  
Reference:
FEDORA-2021-24d4e06195
FEDORA-2021-31fdc84207
GLSA-202210-13
N/A
https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html
https://dev.gnupg.org/T5305
https://dev.gnupg.org/T5328
https://dev.gnupg.org/T5466
https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.oracle.com/security-alerts/cpujan2022.html
https://www.oracle.com/security-alerts/cpuoct2021.html

CPE    1
cpe:/o:debian:debian_linux:9.0
CWE    1
CWE-203
OVAL    19
oval:org.secpod.oval:def:89045028
oval:org.secpod.oval:def:89045087
oval:org.secpod.oval:def:89045024
oval:org.secpod.oval:def:506504
...

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