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CVE-2023-20891

VMware Tanzu Application Service for VMs and Isolation Segment information disclosure vulnerability

MEDIUM
6.5
CVSS Score
Published: July 26, 2023 at 05:41 AM UTC
Updated: June 17, 2026 at 05:31 AM UTC
3 products affected across 1 vendorTanzu Application Service for Virtual MachinesIsolation segmentTanzu Application Service for Vms

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

The VMware Tanzu Application Service for VMs and Isolation Segment contain an information disclosure vulnerability due to the logging of credentials in hex encoding in platform system audit logs. A malicious non-admin user who has access to the platform system audit logs can access hex encoded CF API admin credentials and can push new malicious versions of an application. In a default deployment non-admin users do not have access to the platform system audit logs.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Isolation segment· VMware
95%
2.11.0 ≤ v < 2.11.352.11.x ≤ v < 2.11.352.13.0 ≤ v < 2.13.202.13.x ≤ v < 2.13.203.0.0 ≤ v < 3.0.133.0.x ≤ v < 3.0.134.0.0 ≤ v < 4.0.44.0.x ≤ v < 4.0.42.11.x2.13.x3.0.x4.0.x
Affected range stops below 2.11.35, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.13.20, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.4, so it looks safe — our inference, not a vendor statement
Tanzu Application Service for Virtual Machines· VMware
95%
2.11.0 ≤ v < 2.11.422.13.0 ≤ v < 2.13.243.0.0 ≤ v < 3.0.144.0.0 ≤ v < 4.0.5
Affected range stops below 2.11.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.13.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.5, so it looks safe — our inference, not a vendor statement
Tanzu Application Service for Vms· VMware
60%
2.11.x ≤ v < 2.11.422.13.x ≤ v < 2.13.243.0.x ≤ v < 3.0.144.0.x ≤ v < 4.0.52.11.x2.13.x3.0.x4.0.x
Affected range stops below 2.11.42, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.13.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

PatchVendor Advisory
Source: [email protected]
https://www.vmware.com/security/advisories/VMSA-2023-0016.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMvmware
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-532

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