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CVE Record

CVE-2021-43767: Odyssey passes to client unencrypted bytes from man-in-the-middle When Odyssey storage is configured to use...

Odyssey passes to client unencrypted bytes from man-in-the-middle When Odyssey storage is configured to use the PostgreSQL server using 'trust' authentication with a 'clientcert' requirement or to use 'cert' authentication, a man-in-the-middle attacker can inject false responses to the client's first few queries. Despite the use of SSL certificate verification and encryption, Odyssey will pass these results to client as if they originated from valid server. This is similar to CVE-2021-23222 for PostgreSQL.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Odyssey 1.1 can accept false early PostgreSQL query responses from a network attacker in specific certificate-based authentication configurations. Encryption is present, but the proxy may still pass injected responses to clients. Business risk is mainly data integrity and trust in database results, not confirmed remote takeover.

Executive priority

Prioritize review if Odyssey proxies sensitive database traffic or crosses shared networks. The risk is configuration-dependent and lacks confirmed exploitation evidence.

Technical view

When Odyssey storage connects to PostgreSQL using trust authentication with clientcert, or cert authentication, a man-in-the-middle can inject false responses to the first few client queries. The issue is described as similar to PostgreSQL CVE-2021-23222. No CVSS score or vendor fix is included in the provided sources.

Likely exposure

Exposure appears limited to Odyssey 1.1 deployments using the named PostgreSQL authentication configurations and where an attacker can intercept Odyssey-to-PostgreSQL traffic.

Exploitation context

The provided bundle does not show active exploitation, and KEV status is false. Exploitation requires man-in-the-middle network position plus the affected authentication configuration.

Researcher notes

Evidence is sparse: the CVE text names affected Odyssey 1.1 and two authentication scenarios, but no CVSS, exploit confirmation, or remediation details are supplied. Validate exposure through configuration review first.

Mitigation direction

  • Check Odyssey vendor guidance for fixed versions or configuration changes.
  • Inventory Odyssey 1.1 instances and PostgreSQL authentication settings.
  • Avoid untrusted network paths between Odyssey and PostgreSQL where affected authentication is used.
  • Review whether trust with clientcert or cert authentication is required.

Validation and detection

  • Confirm whether Odyssey 1.1 is deployed.
  • Review Odyssey storage configuration for PostgreSQL trust plus clientcert or cert authentication.
  • Map network paths where interception between Odyssey and PostgreSQL is plausible.
  • Check monitoring for unexpected early query responses or integrity anomalies.
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

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ATT&CK lookup starting points

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cwe · medium confidence lookup

CWE-522: Credential and account abuse lookup

Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2021-43767 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
3Source 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/aOdysseyOdyssey 1.1Listed
Weakness

CWE details

CWE-522

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