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CVE-2023-28116— Buffer overflow in L2CAP due to misconfigured MTU

Quick assessment

Affected
contiki-ng contiki-ng
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Contiki-NG是一套用于下一代IoT（物联网）设备的开源跨平台操作系统。 Contiki-NG 4.8版本及之前版本存在安全漏洞，该漏洞源于当L2CAP模块处理大数据包时，将数据包数据复制到packetbuf时可能会发生缓冲区溢出。

CVSS 8.1 · High EPSS 0.69% · P52
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I. Basic Information for CVE-2023-28116

Vulnerability Information
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Vulnerability Title
Buffer overflow in L2CAP due to misconfigured MTU
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Contiki-NG 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Contiki-NG是一套用于下一代IoT（物联网）设备的开源跨平台操作系统。 Contiki-NG 4.8版本及之前版本存在安全漏洞，该漏洞源于当L2CAP模块处理大数据包时，将数据包数据复制到packetbuf时可能会发生缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
contiki-ng contiki-ng <= 4.8 -

II. Public POCs for CVE-2023-28116

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III. Intelligence Information for CVE-2023-28116

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Patches & Fixes for CVE-2023-28116 (1)

Vendor Advisories for CVE-2023-28116 (1)

IV. Related Vulnerabilities

Same product: contiki-ng
Same vendor: contiki-ng
Same weakness: CWE-120