CVE-2022-41873

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Summary

CVECVE-2022-41873
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-11-11 04:15:00 UTC
Updated2022-11-18 14:05:00 UTC
DescriptionContiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. Versions prior to 4.9 are vulnerable to an Out-of-bounds read. While processing the L2CAP protocol, the Bluetooth Low Energy stack of Contiki-NG needs to map an incoming channel ID to its metadata structure. While looking up the corresponding channel structure in get_channel_for_cid (in os/net/mac/ble/ble-l2cap.c), a bounds check is performed on the incoming channel ID, which is meant to ensure that the channel ID does not exceed the maximum number of supported channels.However, an integer truncation issue leads to only the lowest byte of the channel ID to be checked, which leads to an incomplete out-of-bounds check. A crafted channel ID leads to out-of-bounds memory to be read and written with attacker-controlled data. The vulnerability has been patched in the "develop" branch of Contiki-NG, and will be included in release 4.9. As a workaround, Users can apply the patch in Contiki-NG pull request 2081 on GitHub.

Risk And Classification

Problem Types: CWE-125

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Contiki-ng Contiki-ng All All All All

References

ReferenceSourceLinkTags
Out-of-bounds read in BLE L2CAP module · Advisory · contiki-ng/contiki-ng · GitHub CONFIRM github.com
Fix l2cap_channels OOB in get_channel_for_cid by Scepticz · Pull Request #2081 · contiki-ng/contiki-ng · GitHub MISC github.com
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