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CVE-2021-31245: omr-admin.py in openmptcprouter-vps-admin 0.57.3 and earlier compares the user provided password with the o...

omr-admin.py in openmptcprouter-vps-admin 0.57.3 and earlier compares the user provided password with the original password in a length dependent manner, which allows remote attackers to guess the password via a timing attack.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-31245 affects openmptcprouter-vps-admin 0.57.3 and earlier. Its admin password check could leak timing differences, which may help a remote attacker guess the password over repeated attempts. The sources do not provide CVSS, active exploitation evidence, or full affected inventory details.

Executive priority

Treat this as a targeted administrative-access risk, not a broad emergency. Prioritize internet-exposed or third-party-accessible admin panels first, because successful password recovery could lead to control of the OpenMPTCProuter VPS administration plane.

Technical view

The issue is in omr-admin.py, where user-supplied passwords were compared with the original password in a length-dependent manner. That creates a timing side channel during authentication. A referenced upstream commit is associated with the issue, but the bundle does not state release packaging or formal mitigation details.

Likely exposure

Exposure is most likely where openmptcprouter-vps-admin 0.57.3 or earlier is deployed and its admin interface is reachable by untrusted networks. Source data lists no CPEs or vendor/product metadata beyond the project name and affected version statement.

Exploitation context

The CVE description says remote attackers may guess the password using a timing attack. CISA KEV status is false in the bundle, and no cited source here confirms active exploitation in the wild.

Researcher notes

Evidence is limited to the CVE description, project references, a public analysis link, and an upstream commit reference. No CVSS, CWE, CPE, KEV listing, or confirmed exploitation is provided in the bundle. Avoid assuming exploit practicality without environment-specific latency and rate-limit context.

Mitigation direction

  • Identify any openmptcprouter-vps-admin deployments and their exact versions.
  • Upgrade beyond 0.57.3 if vendor guidance confirms the fix is included.
  • Review the referenced upstream commit and release notes before change approval.
  • Restrict admin access to trusted networks or VPN-only paths.
  • Use strong, rotated admin credentials while remediation is pending.

Validation and detection

  • Confirm whether omr-admin.py exists in deployed openmptcprouter-vps-admin instances.
  • Record installed version and compare it with the 0.57.3-and-earlier affected range.
  • Check whether the referenced upstream commit is present in deployed code.
  • Review access logs for abnormal repeated authentication attempts.
  • Verify admin interface exposure from external and internal network zones.
Prepared
Confidence
medium
Sources
6

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

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-31245 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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