CVE-2024-29903Public exploitNetwork attack vector

Host denial of service via unbounded manifest allocation

Published Apr 10, 2024 · Updated Aug 2, 2024

Resource exhaustion in Sigstore Cosign before 2.2.4 allows remote authenticated users to crash the host via a malicious OCI artifact. The remote signature-loading Get method sizes a new slice from the unvalidated layer count in an artifact manifest, allowing excessive memory allocation. Exploitation requires placing the crafted artifact where Cosign processes it and inducing a user or workflow to perform the affected operation; memory exhaustion can interrupt every service on the host.

CVSS severity4.2
Medium
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Sigstore Cosign before 2.2.4 allows remote authenticated users to crash the host via a malicious OCI artifact. The remote signature-loading Get method sizes a new slice from the unvalidated layer count in an artifact manifest, allowing excessive memory allocation. Exploitation requires placing the crafted artifact where Cosign processes it and inducing a user or workflow to perform the affected operation; memory exhaustion can interrupt every service on the host.

The record

CVE
CVE-2024-29903
Published
Apr 10, 2024
Updated
Aug 2, 2024
Vendor
Sigstore
Product
Cosign
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 10, 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=0 <2.2.4
  2. Affected versionversion=< 2.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sigstore · Cosignversion=0 <2.2.4; version=< 2.2.4

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.2GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H

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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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