CVE-2024-38320: IBM Storage Protect Weak Encryption Flaw

CVE-2024-38320 Overview

CVE-2024-38320 affects IBM Storage Protect for Virtual Environments: Data Protection for VMware and the IBM Storage Protect Backup-Archive Client. Versions 8.1.0.0 through 8.1.23.0 use weaker than expected cryptographic algorithms. An attacker positioned to capture protected data can decrypt highly sensitive information processed by the backup client. The flaw is classified under CWE-327: Use of a Broken or Risky Cryptographic Algorithm. The vulnerability is remotely reachable, requires no privileges, and does not require user interaction.

Critical Impact
An attacker with access to ciphertext produced by affected IBM Storage Protect clients can decrypt highly sensitive backup data without valid credentials.

Affected Products

IBM Storage Protect for Virtual Environments: Data Protection for VMware 8.1.0.0 through 8.1.23.0
IBM Storage Protect Backup-Archive Client 8.1.0.0 through 8.1.23.0
Supported platforms include Microsoft Windows, Linux, IBM AIX, Apple macOS, HP-UX, and Oracle Solaris

Discovery Timeline

2025-01-27 - CVE-2024-38320 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-38320

Vulnerability Analysis

The vulnerability stems from the IBM Storage Protect client relying on cryptographic algorithms that no longer meet modern strength requirements. Backup workloads frequently contain regulated data, including financial records, personally identifiable information, and source code. When the client encrypts this data using weak primitives, an attacker who obtains the ciphertext can perform cryptanalysis to recover the plaintext.

The issue is confined to confidentiality. Integrity and availability are not directly affected, which aligns with a cryptographic weakness rather than a memory corruption or logic flaw. The attack does not require authentication, because the weakness exists in the protection of data once it leaves the client.

Root Cause

The root cause is the selection of obsolete or under-strength cryptographic algorithms within the Storage Protect client codebase. Algorithms previously considered acceptable have aged out of compliance with current standards such as NIST SP 800-131A. IBM remediated the issue by replacing the affected primitives with stronger algorithms in the fixed release.

Attack Vector

Exploitation requires the attacker to obtain ciphertext produced by an affected client. Plausible access paths include intercepting backup traffic on the network, accessing backup storage media, or recovering data from a misconfigured repository. After collecting the ciphertext, the attacker performs offline cryptanalysis against the weak algorithm to recover sensitive plaintext.

No specific public proof of concept is available for CVE-2024-38320, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the IBM Support Document #7173462 and IBM Support Document #7173465 for vendor-confirmed technical details.

Detection Methods for CVE-2024-38320

Indicators of Compromise

No file-based or network-based indicators of compromise are published for CVE-2024-38320, because exploitation occurs offline against captured ciphertext.
Unexpected disclosure of backup contents in external locations may indicate prior data capture and decryption.

Detection Strategies

Inventory all hosts running IBM Storage Protect Backup-Archive Client or Data Protection for VMware and identify versions 8.1.0.0 through 8.1.23.0.
Audit backup transport channels for use of deprecated TLS versions, weak ciphers, or unencrypted transfer paths that could expose ciphertext to interception.
Review access logs on backup repositories and storage targets for unauthorized read activity that could indicate ciphertext exfiltration.

Monitoring Recommendations

Forward Storage Protect client and server logs to a centralized analytics platform and alert on anomalous large-volume reads or external transfers.
Monitor network egress from backup infrastructure to detect data leaving administrative boundaries.
Track configuration drift on Storage Protect clients to ensure cryptographic settings remain aligned with policy after patching.

How to Mitigate CVE-2024-38320

Immediate Actions Required

Upgrade IBM Storage Protect Backup-Archive Client and Data Protection for VMware to the fixed release published by IBM in the referenced support documents.
Restrict network access to Storage Protect infrastructure so that only authorized backup servers and administrative hosts can reach client and server ports.
Rotate any encryption keys used by affected clients after upgrading, and consider re-encrypting backup data sets that contain regulated information.

Patch Information

IBM released fixed versions addressing CVE-2024-38320. Customers should consult the IBM Support Document #7173462 for the Backup-Archive Client and the IBM Support Document #7173465 for Data Protection for VMware to obtain the specific fixed version and upgrade instructions for each supported operating system.

Workarounds

Where immediate upgrade is not possible, ensure backup traffic traverses a strong TLS tunnel or dedicated, segmented network to limit ciphertext exposure.
Apply storage-level encryption with strong, current algorithms on backup repositories so that the weak client-side cryptography is not the only protection layer.
Limit administrative access to backup systems and storage targets to reduce the population of users who could exfiltrate ciphertext.

bash

# Example: verify installed Storage Protect Backup-Archive Client version on Linux
dsmc query session | grep -i "Client Version"

# Example: list installed package version on RHEL-based systems
rpm -qa | grep -i TIVsm