Contiki-NG is an operating system for Internet of Things devices. An off-by-one error can be triggered in the Antelope database management system in the Contiki-NG operating system in versions 4.8 and prior. The problem exists in the Contiki File System (CFS) backend for the storage of data (file os/storage/antelope/storage-cfs.c). In the functions storage_get_index and storage_put_index, a buffer for merging two strings is allocated with one byte less than the maximum size of the merged strings, causing subsequent function calls to the cfs_open function to read from memory beyond the buffer size. The vulnerability has been patched in the "develop" branch of Contiki-NG, and is expected to be included in the next release. As a workaround, the problem can be fixed by applying the patch in Contiki-NG pull request #2425.
CVE-2023-30546
CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 39% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EPSS
- 46.3%
- KEV
- Not listed
Published
April 26, 2023
Last Modified
November 21, 2024
References (4)
- security-advisories@githubhttps://github.com/contiki-ng/contiki-ng/pull/2425
- security-advisories@githubhttps://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-257g-w39m-5jj4
- af854a3a-2127-422b-91ae-364da2661108https://github.com/contiki-ng/contiki-ng/pull/2425
- af854a3a-2127-422b-91ae-364da2661108https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-257g-w39m-5jj4
Frequently asked(5)
What is CVE-2023-30546?
CVE-2023-30546 is a critical vulnerability published on April 26, 2023. Contiki-NG is an operating system for Internet of Things devices. An off-by-one error can be triggered in the Antelope database management system in the Contiki-NG operating system in versions 4.8 and prior. The problem exists in the Contiki File System (CFS) backend for the storage of data (file…
When was CVE-2023-30546 disclosed?
CVE-2023-30546 was first published in the National Vulnerability Database on April 26, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-30546 actively exploited?
CVE-2023-30546 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-30546?
CVE-2023-30546 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-30546?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-30546, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2023-30546
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