CVE-2021-38947

Vulnerability

IBM Spectrum Copy Data Management versions 2.2.13 and earlier use weaker than expected cryptographic algorithms. This weakness affects the encryption mechanisms employed by the product, potentially compromising the confidentiality of sensitive data. The vulnerability is identified as CVE-2021-38947 and is documented in IBM's security advisory [1]. The CVSS score is 5.9, with a vector of AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N, indicating high attack complexity but no required privileges or user interaction [1].

Exploitation

An attacker with network access to the affected system can exploit this cryptographic weakness. The attack complexity is high, meaning that successful exploitation may require conditions such as precise timing or knowledge of specific implementation details. No authentication or user interaction is needed, and the attacker does not need any special privileges [1].

Impact

Successful exploitation allows an attacker to decrypt highly sensitive information that is protected by the weak cryptographic algorithms. The impact is limited to confidentiality (CIA: confidentiality high, integrity and availability none). The attacker gains access to sensitive data without affecting system integrity or availability [1].

Mitigation

IBM has released a fix for this vulnerability. According to the advisory, customers should apply the appropriate update to IBM Spectrum Copy Data Management version 2.2.14 or later. The advisory can be accessed at the IBM Support page [1]. No workarounds are documented; updating to the patched version is the recommended mitigation.