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CVE Record

CVE-2020-17135: Azure DevOps Server Spoofing Vulnerability

Azure DevOps Server Spoofing Vulnerability

MediumCVSS 6.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a medium-severity spoofing vulnerability in Microsoft Azure DevOps Server. A low-privileged authenticated attacker could affect confidentiality and integrity, but the provided sources do not describe the spoofing method or any business-specific impact.

Executive priority

Handle through normal vulnerability remediation timelines for internet-facing or broadly accessible DevOps servers. Escalate if the affected server supports sensitive repositories, build pipelines, deployment credentials, or regulated development workflows.

Technical view

CVE-2020-17135 affects Azure DevOps Server 2019 Update 1.1 and Azure DevOps Server 2019.0.1. CVSS 3.1 is 6.4 with network attack vector, low complexity, low privileges required, no user interaction, changed scope, low confidentiality and integrity impact, and no availability impact.

Likely exposure

Exposure is likely limited to organizations running the listed on-premises Azure DevOps Server 2019 versions. Cloud Azure DevOps Services are not identified as affected in the provided bundle.

Exploitation context

The source bundle does not show CISA KEV listing or cite active exploitation. Exploit maturity is listed as unproven in the CVSS vector, so treat exploitation evidence as incomplete.

Researcher notes

The public bundle is sparse: it names affected products, severity, CVSS, and Microsoft advisories, but not root cause, request path, proof of concept, or detailed remediation text. Do not infer broader product impact without vendor confirmation.

Mitigation direction

  • Check MSRC guidance for the applicable Azure DevOps Server security update.
  • Patch or upgrade affected Azure DevOps Server 2019 installations.
  • Restrict Azure DevOps Server access to trusted networks where feasible.
  • Review low-privilege accounts and remove unnecessary access.

Validation and detection

  • Inventory Azure DevOps Server deployments and confirm exact installed versions.
  • Compare installed versions against MSRC guidance for CVE-2020-17135.
  • Confirm security updates were applied successfully on affected servers.
  • Review logs for suspicious authenticated activity around DevOps resources.
Prepared
Confidence
medium
Sources
4

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2020-17135 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.4 (3.1)
Known Exploited
No
Published

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

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
3Timeline events
1ADP providers
3Source 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
6.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C3.12.7microsoft

Vulnerability scoring details

Base CVSS 3.1 score

6.4Medium
CVSS 3.1 vector shape for CVE-2020-17135Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MicrosoftAzure DevOps Server 2019 Update 1.11.0Listed
MicrosoftAzure DevOps Server 2019.0.12019.0.0Listed
Weakness

CWE details

No CWE listed

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