CVE-2024-54140 json
sigstore-java has a vulnerability with bundle verification
published 2024-12-05 23 mo ago modified 2026-06-17 4 mo ago also GHSA-jp26-88mw-89qr , EUVD-2024-3484
- cvss
- 2.1
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
sigstore-java is a sigstore java client for interacting with sigstore infrastructure. sigstore-java has insufficient verification for a situation where a bundle provides a invalid signature for a checkpoint. This bug impacts clients using any variation of KeylessVerifier.verify(). Currently checkpoints are only used to ensure the root hash of an inclusion proof was provided by the log in question. Failing to validate that means a bundle may provide an inclusion proof that doesn't actually correspond to the log in question. This may eventually lead a monitor/witness being unable to detect when a compromised logs are providing different views of themselves to different clients. There are other mechanisms right now that mitigate this, such as the signed entry timestamp. Sigstore-java currently requires a valid signed entry timestamp. By correctly verifying the signed entry timestamp we can make certain assertions about the log signing the log entry (like the log was aware of the artifact signing event and signed it). Therefore the impact on clients that are not monitors/witnesses is very low. This vulnerability is fixed in 1.2.0.
Patch / fix
- maven dev.sigstore:sigstore-java 1.2.0
- sigstore sigstore-java 1.2.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 22 mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 2.1 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 2.1 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | dev.sigstore:sigstore-java | <1.2.0 |
1.2.0 |
Affected products
- sigstore sigstore-java
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/sigstore/sigstore-conformance/pull/139
web
-
github.com
/sigstore/sigstore-java/commit/23fb4885e6704a5df4977f7acf253a745349edf9
web
-
github.com
/sigstore/sigstore-java/security/advisories/GHSA-jp26-88mw-89qr
web
-
nvd.nist.gov
/vuln/detail/CVE-2024-54140
advisory
-
github.com
/sigstore/sigstore-java
package
Sources
- CVE List CVE-2024-54140
- GitHub Advisory GHSA-jp26-88mw-89qr
- NVD CVE-2024-54140
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