A vulnerability in the Cisco ACI Multi-Site CloudSec encryption feature of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, remote attacker to read or modify intersite encrypted traffic. This vulnerability is due to an issue with the implementation of the ciphers that are used by the CloudSec encryption feature on affected switches. An attacker with an on-path position between the ACI sites could exploit this vulnerability by intercepting intersite encrypted traffic and using cryptanalytic techniques to break the encryption. A successful exploit could allow the attacker to read or modify the traffic that is transmitted between the sites. Cisco has not released and will not release software updates that address this vulnerability.
Published 2023-07-12 14:15:10
Updated 2024-01-25 17:15:33
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2023-20185

0.08%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 32 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-20185

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.4
HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
2.2
5.2
NIST
7.4
HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
2.2
5.2
Cisco Systems, Inc.

CWE ids for CVE-2023-20185

  • The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.
    Assigned by: nvd@nist.gov (Primary)
  • The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
    Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2023-20185

Products affected by CVE-2023-20185

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