BugZero | F5 BugID 1043141 - Misleading error 'Symmetric Unit Key decrypt failu...

F5 - Defect ID: 1043141

Misleading error 'Symmetric Unit Key decrypt failure - decrypt failure' when loading UCS from another BIG-IP

F5 - Defect ID: 1043141

Misleading error 'Symmetric Unit Key decrypt failure - decrypt failure' when loading UCS from another BIG-IP

Last updated on June 1st, 2026

BugZero Risk Score
7.0 Medium

Overall: 7.0

Severity: 7.3

Community: 6.9

Lifecycle: 7.5

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Bug Details

Priority: 3-Major
Status: Reopened
Impact Category: TMOS
Views: 2

Description

Symptoms

Loading a UCS file from another BIG-IP results in an error message similar to: "/usr/bin/tmsh -n -g -a load sys config partitions all platform-migrate" - failed. -- 010713d0:3: Symmetric Unit Key decrypt failure - decrypt failure The error message is misleading as the issue is unrelated to master key decryption.

Impact

Platform migration fails with a misleading error message.

Conditions

-- Loading a UCS archive from a different BIG-IP. -- The UCS archive does not contain a ".unitkey" file. -- The target system does have the correct master key value configured. -- There is some other MCPD validation issue in the configuration.

Workaround

Once the issue has happened, you can either: - Examine the LTM log file for other error messages from MCPD and then correct the configuration issue(s). OR: - Re-start MCPD. For more information, refer K36822000.

Fix Information

None

Change history

2026-06-01 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3, 17.1.3.1, 17.1.3.2

2026-05-05 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3, 17.1.3.1, 17.1.3.2

2026-04-28 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3, 17.1.3.1

2026-04-21 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3, 17.1.3.1

2026-04-17 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3, 17.1.3.1

2026-04-16 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3, 17.1.3.1

2026-04-15 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3, 17.1.3.1

2025-12-31 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3

2025-12-12 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3

2025-12-10 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3

2025-12-05 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3

2025-11-15 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3

2025-10-21 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3

2025-10-19 Added: 15.1.10.7, 15.1.10.8, 16.1.6.1, 17.1.3

2025-10-15 Added: 17.1.3

2025-09-12 Added: 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 17.0.0, 17.0.0.1, 17.0.0.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2

Relevant Products

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Affected versions:15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 15.1.10.7, 15.1.10.8, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 16.1.6.1, 17.0.0, 17.0.0.1, 17.0.0.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.1.3.1, 17.1.3.2

Fixed versions: No known fixed versions

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: No known fixed versions

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F5 - Defect ID: 1043141

Misleading error 'Symmetric Unit Key decrypt failure - decrypt failure' when loading UCS from another BIG-IP

F5 - Defect ID: 1043141

Misleading error 'Symmetric Unit Key decrypt failure - decrypt failure' when loading UCS from another BIG-IP

Last updated on June 1st, 2026

BugZero Risk Score7.0 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Top F5 Defects

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BugZero Risk Score
7.0 Medium