CVE-2021-2351

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).

• CWE-327
• CWE-384

• http://packetstormsecurity.com/files/165255/Oracle-Database-Protection-Mechanism-Bypass.htmlExploit, Third Party Advisory, VDB Entry
• http://packetstormsecurity.com/files/165258/Oracle-Database-Weak-NNE-Integrity-Key-Derivation.htmlExploit, Third Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2021/Dec/19Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/Dec/20Exploit, Mailing List, Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Vendor Advisory
• https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Vendor Advisory
• https://www.oracle.com/security-alerts/cpujan2023.htmlVendor Advisory
• https://www.oracle.com/security-alerts/cpujul2021.htmlPatch, Vendor Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlVendor Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Vendor Advisory
• http://packetstormsecurity.com/files/165255/Oracle-Database-Protection-Mechanism-Bypass.htmlExploit, Third Party Advisory, VDB Entry
• http://packetstormsecurity.com/files/165258/Oracle-Database-Weak-NNE-Integrity-Key-Derivation.htmlExploit, Third Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2021/Dec/19Exploit, Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2021/Dec/20Exploit, Mailing List, Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Vendor Advisory
• https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Vendor Advisory
• https://www.oracle.com/security-alerts/cpujan2023.htmlVendor Advisory
• https://www.oracle.com/security-alerts/cpujul2021.htmlPatch, Vendor Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlVendor Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Vendor Advisory

Published

Jul 21, 2021

Last Modified

Jun 17, 2026

Status

Modified