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CVE Record

CVE-2020-3504: Cisco UCS Manager Software Local Management CLI Denial of Service Vulnerability

A vulnerability in the local management (local-mgmt) CLI of Cisco UCS Manager Software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of CLI command parameters. An attacker could exploit this vulnerability by executing specific commands on the local-mgmt CLI on an affected device. A successful exploit could allow the attacker to cause internal system processes to fail to terminate properly, which could result in a buildup of stuck processes and lead to slowness in accessing the UCS Manager CLI and web UI. A sustained attack may result in a restart of internal UCS Manager processes and a temporary loss of access to the UCS Manager CLI and web UI.

LowCVSS 3.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2020-3504 is a low-severity Cisco UCS Manager issue where an authenticated local user can slow or temporarily disrupt UCS Manager access. The reported impact is availability loss for the CLI and web UI, not data exposure or system takeover.

Executive priority

Treat as a controlled maintenance issue unless UCS Manager local access is broadly granted. Prioritize where UCS Manager availability is business-critical or administrator access is loosely managed.

Technical view

The local-mgmt CLI improperly handles command parameters. An authenticated local attacker can cause internal UCS Manager processes to remain stuck, degrading CLI and web UI responsiveness. Sustained activity may restart internal UCS Manager processes and temporarily block access.

Likely exposure

Exposure is mainly Cisco UCS Manager environments where users have authenticated local-mgmt CLI access. The provided data does not identify specific affected software versions beyond Cisco Unified Computing System managed deployments.

Exploitation context

The source bundle does not show KEV listing or public active exploitation. Exploitation requires authenticated local access and specific CLI interaction, limiting remote threat exposure.

Researcher notes

Evidence supports local authenticated denial of service through CLI parameter handling. Sources do not provide exploit details, affected version ranges, or confirmed active exploitation in the supplied bundle.

Mitigation direction

  • Review the Cisco advisory for affected releases and fixed software guidance.
  • Restrict local-mgmt CLI access to trusted administrators only.
  • Remove unnecessary local accounts or privileges from UCS Manager.
  • Monitor UCS Manager CLI and web UI availability for sustained degradation.

Validation and detection

  • Inventory Cisco UCS Manager deployments and versions.
  • Compare deployments against Cisco advisory affected-version guidance.
  • Confirm which users can access the local-mgmt CLI.
  • Review monitoring for CLI or web UI slowness matching the described impact.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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CVE-2020-3504 mapping review

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Vulnerability profileCVE Program record
Severity
Low
CVSS
3.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
3.3CVSS 3.1LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L1.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

3.3Low
CVSS 3.1 vector shape for CVE-2020-3504Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco Unified Computing System (Managed)n/aListed
Weakness

CWE details

CWE-664

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-664 · source CWE mapping

Improper Control of a Resource Through its Lifetime

Improper Control of a Resource Through its Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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