2021-20505 | IBM PowerVM Hypervisor FW950 LPM Traffic cryptographic issues (XFDB-198232)

CVSS Meta Temp Score

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CTI Interest Score

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2.1 $0-$5k 0.11

A vulnerability was found in IBM PowerVM Hypervisor FW920, PowerVM Hypervisor FW930, PowerVM Hypervisor FW940, PowerVM Hypervisor and PowerVM Hypervisor FW950 and classified as problematic. Affected by this issue is an unknown code block of the component LPM Traffic Handler. The manipulation with an unknown input leads to a weak encryption vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality. CVE summarizes:

The PowerVM Logical Partition Mobility(LPM) (PowerVM Hypervisor FW920, FW930, FW940, and FW950) encryption key exchange protocol can be compromised. If an attacker has the ability to capture encrypted LPM network traffic and is able to gain service access to the FSP they can use this information to perform a series of PowerVM service procedures to decrypt the captured migration traffic IBM X-Force ID: 198232

The weakness was shared 07/29/2021. The advisory is shared for download at ibm.com. This vulnerability is handled as CVE-2021-20505 since 12/17/2020. The exploitation is known to be difficult. The attack may be launched remotely. Additional levels of successful authentication are needed for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (198232).



VulDB Meta Base Score: 2.2
VulDB Meta Temp Score: 2.1

VulDB Base Score: 2.2
VulDB Temp Score: 2.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

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Vector Complexity Authentication Confidentiality Integrity Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Weak encryption
CWE: CWE-310
ATT&CK: T1600

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: ibm.com

12/17/2020 CVE assigned
07/29/2021 +223 days Advisory disclosed
07/29/2021 +0 days VulDB entry created
08/05/2021 +7 days VulDB last updateVendor: https://www.ibm.com/

Advisory: ibm.com
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2021-20505 (🔒)
X-Force: 198232

Created: 07/29/2021 18:17
Updated: 08/05/2021 17:20
Changes: (1) source_cve_cna
Complete: 🔍


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