CVE-2023-34041Network attack vector

Log identifier manipulation via hop-by-hop headers

Published Sep 8, 2023 · Updated Aug 2, 2024

HTTP header handling in Cloud Foundry Routing Release before 0.278.0 allows remote attackers to alter request identifiers recorded in logs. Gorouter fails to protect B3 and X-B3-SpanID tracing headers named by an untrusted Connection header, so hop-by-hop removal changes the identifier used by access logging. No authentication or user interaction is required; the bounded impact is forged log correlation data, not disclosure or service interruption.

CVSS severity5.3
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP header handling in Cloud Foundry Routing Release before 0.278.0 allows remote attackers to alter request identifiers recorded in logs. Gorouter fails to protect B3 and X-B3-SpanID tracing headers named by an untrusted Connection header, so hop-by-hop removal changes the identifier used by access logging. No authentication or user interaction is required; the bounded impact is forged log correlation data, not disclosure or service interruption.

The record

CVE
CVE-2023-34041
Published
Sep 8, 2023
Updated
Aug 2, 2024
Vendor
Cloud Foundry Foundation
Product
cf-deployment
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=all <32.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cloud Foundry Foundation · cf-deploymentversion=all <32.4.0
Cloud Foundry Foundation · Routing Releaseversion=all <0.278.0

Published CVSS scores

5.3VMwareCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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