VDB-223344 · CVE-2023-28116 · GHSA-m737-4vx6-pfqp

Contiki-NG up to 4.8/4.9 BLE L2CAP Module PACKETBUF_SIZE buffer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.1	$0-$5k	0.00

A vulnerability classified as very critical has been found in Contiki-NG up to 4.8/4.9. Affected is some unknown functionality of the component BLE L2CAP Module. The manipulation of the argument PACKETBUF_SIZE with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Contiki-NG is an open-source, cross-platform operating system for internet of things (IoT) devices. In versions 4.8 and prior, an out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system. The network stack of Contiki-NG uses a global buffer (packetbuf) for processing of packets, with the size of PACKETBUF_SIZE. In particular, when using the BLE L2CAP module with the default configuration, the PACKETBUF_SIZE value becomes larger then the actual size of the packetbuf. When large packets are processed by the L2CAP module, a buffer overflow can therefore occur when copying the packet data to the packetbuf. The vulnerability has been patched in the "develop" branch of Contiki-NG, and will be included in release 4.9. The problem can be worked around by applying the patch manually.

The weakness was shared 03/18/2023 as GHSA-m737-4vx6-pfqp. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-28116 since 03/10/2023. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/11/2023).

Upgrading to version 4.9 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfo

Name

Contiki-NG

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 9.2
VulDB Meta Temp Score: 9.1

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 8.1
CNA Vector (GitHub, Inc.): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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unlock	unlock	unlock	unlock	unlock	unlock
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Contiki-NG 4.9
Patch: github.com

Timelineinfo

03/10/2023 CVE reserved
03/18/2023 +8 days Advisory disclosed
03/18/2023 +0 days VulDB entry created
04/11/2023 +24 days VulDB last update

Sourcesinfo

Advisory: GHSA-m737-4vx6-pfqp
Status: Confirmed

CVE: CVE-2023-28116 (🔒)

Entryinfo

Created: 03/18/2023 08:31 AM
Updated: 04/11/2023 02:48 PM
Changes: 03/18/2023 08:31 AM (52), 04/11/2023 02:48 PM (11)
Complete: 🔍