Vulnerability in the Advanced Networking Option component of Oracle Database Server. Supported versions that are affected are 12.1.0.2, 12.2.0.1 and 19c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Advanced Networking Option. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Advanced Networking Option, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Advanced Networking Option. Note: The July 2021 Critical Patch Update introduces a number of Native Network Encryption changes to deal with vulnerability CVE-2021-2351 and prevent the use of weaker ciphers. Customers should review: "Changes in Native Network Encryption with the July 2021 Critical Patch Update" (Doc ID 2791571.1). CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).
Published 2021-07-21 15:15:22
Updated 2024-02-16 18:48:46
Source Oracle
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-2351

Probability of exploitation activity in the next 30 days: 1.28%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 85 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-2351

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
5.1
MEDIUM AV:N/AC:H/Au:N/C:P/I:P/A:P
4.9
6.4
NIST
7.5
HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
1.6
5.9
NIST
8.3
HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
1.6
6.0
Oracle

CWE ids for CVE-2021-2351

  • The product uses a broken or risky cryptographic algorithm or protocol.
    Assigned by: nvd@nist.gov (Primary)
  • Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-2351

Products affected by CVE-2021-2351

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