Vulnerability · Published Apr 26, 2023 · Assigned by GitHub_M

CVE-2023-30546Contiki-NG has off-by-one error in Antelope DBMS

Critical 9.8

In plain English

A critical-severity out-of-bounds read in contiki-ng from contiki-ng. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.6%top 49.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
contiki-ng	contiki-ng	<= 4.8

Weakness: CWE-125, CWE-193 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-257g-w39m-5jj4 x_refsource_CONFIRM
https://github.com/contiki-ng/contiki-ng/pull/2425 x_refsource_MISC