CVE-2023-30551Network attack vector

Service crash via unchecked archive metadata sizes

Published May 8, 2023 · Updated Jan 29, 2025

Resource exhaustion in Sigstore Rekor before 1.1.1 allows remote attackers to crash the service via a crafted JAR or APK submission. The JAR verifier passes unchecked META-INF members to relic, while the APK parser allocates byte slices from unchecked .SIGN and .PKGINFO tar sizes. Unauthenticated network submission is sufficient; exhausting process memory interrupts the transparency-log service without changing stored records.

CVSS severity7.5
High
EPSS probability1.05%
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 Rekor before 1.1.1 allows remote attackers to crash the service via a crafted JAR or APK submission. The JAR verifier passes unchecked META-INF members to relic, while the APK parser allocates byte slices from unchecked .SIGN and .PKGINFO tar sizes. Unauthenticated network submission is sufficient; exhausting process memory interrupts the transparency-log service without changing stored records.

The record

CVE
CVE-2023-30551
Published
May 8, 2023
Updated
Jan 29, 2025
Vendor
Sigstore
Product
Rekor
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2025Record 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=< 1.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sigstore · Rekorversion=< 1.1.1

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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