CVE Vulnerabilities

CVE-2021-21488

Deserialization of Untrusted Data

Published: Mar 09, 2021 | Modified: Nov 21, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
4 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

Knowledge Management versions 7.01, 7.02, 7.30, 7.31, 7.40, 7.50 allows a remote attacker with basic privileges to deserialize user-controlled data without verification, leading to insecure deserialization which triggers the attacker’s code, therefore impacting Availability.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Netweaver_knowledge_management Sap 7.01 (including) 7.01 (including)
Netweaver_knowledge_management Sap 7.02 (including) 7.02 (including)
Netweaver_knowledge_management Sap 7.30 (including) 7.30 (including)
Netweaver_knowledge_management Sap 7.31 (including) 7.31 (including)
Netweaver_knowledge_management Sap 7.40 (including) 7.40 (including)
Netweaver_knowledge_management Sap 7.50 (including) 7.50 (including)

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References