CVE-2024-40632Public exploitNetwork attack vector

Proxy shutdown via unauthenticated localhost admin request

Published Jul 15, 2024 · Updated Aug 2, 2024

SSRF-assisted denial of service in Linkerd before edge-24.6.2 allows remote attackers to stop a proxy through its admin endpoint. The admin server accepts an unauthenticated localhost POST to /shutdown and immediately signals the proxy to terminate. Exploitation requires an application behind the proxy that can be induced through SSRF to request localhost:4191/shutdown; only that proxy's service is interrupted.

CVSS severity3.7
Low
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

SSRF-assisted denial of service in Linkerd before edge-24.6.2 allows remote attackers to stop a proxy through its admin endpoint. The admin server accepts an unauthenticated localhost POST to /shutdown and immediately signals the proxy to terminate. Exploitation requires an application behind the proxy that can be induced through SSRF to request localhost:4191/shutdown; only that proxy's service is interrupted.

The record

CVE
CVE-2024-40632
Published
Jul 15, 2024
Updated
Aug 2, 2024
Vendor
Linkerd
Product
Linkerd
Classifications
CWE-918, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2024CVE 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=< edge-24.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Linkerd · Linkerdversion=< edge-24.6.2

Published CVSS scores

3.7GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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