BugZero | F5 BugID 636818 - IKEv1 DELETE payload can use wrong source IP addre...

F5 - Defect ID: 636818

IKEv1 DELETE payload can use wrong source IP address for floating IPs

F5 - Defect ID: 636818

IKEv1 DELETE payload can use wrong source IP address for floating IPs

Last updated on July 18th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: TMOS

Description

Symptoms

When a BIG-IP system uses a floating IP to establish an IKEv1 IPsec tunnel, and then the Security Association (SA) is deleted, under rare conditions the ISAKMP notification will use a non-floating IP as the source address.

Impact

The IKEv1 racoon daemon now deletes an SA without requiring the source IP to be the correct peer. It is possible that this will allow a random peer to delete another peer's security associations.

Conditions

Define a tunnel with floating IP addresses, then toggle version between IKEv1 and IKEv2.

Workaround

None.

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6, 13.0.0, 13.0.0 hf1, 13.0.0 hf2, 13.0.0 hf3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1

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: 636818

IKEv1 DELETE payload can use wrong source IP address for floating IPs

F5 - Defect ID: 636818

IKEv1 DELETE payload can use wrong source IP address for floating IPs

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 636818

IKEv1 DELETE payload can use wrong source IP address for floating IPs

F5 - Defect ID: 636818

IKEv1 DELETE payload can use wrong source IP address for floating IPs

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.9 Medium

BugZero Risk Score
6.9 Medium