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CVE-2024-41125— Out-of-bounds read in SNMP when decoding a string in Contiki-NG

Quick assessment

Affected
contiki-ng contiki-ng
Exploitation
Public or AI PoC available; prioritize validation
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Contiki-NG开源的一个适用于物联网中资源受限设备的操作系统。 Contiki-NG存在缓冲区错误漏洞，该漏洞源于向运行启用了 SNMP 的 Contiki-NG 操作系统的设备发送数据包时，可能会触发 1 字节的越界读取。

CVSS 8.4 · High EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-41125

Vulnerability Information
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Vulnerability Title
Out-of-bounds read in SNMP when decoding a string in Contiki-NG
Source: CVE Program / CVE List V5
Vulnerability Description
Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte can be triggered when sending a packet to a device running the Contiki-NG operating system with SNMP enabled. The SNMP module is disabled in the default Contiki-NG configuration. The vulnerability exists in the os/net/app-layer/snmp/snmp-ber.c module, where the function snmp_ber_decode_string_len_buffer decodes the string length from a received SNMP packet. In one place, one byte is read from the buffer, without checking that the buffer has another byte available, leading to a possible out-of-bounds read. The problem has been patched in Contiki-NG pull request #2936. It will be included in the next release of Contiki-NG. Users are advised to apply the patch manually or to wait for the next release. A workaround is to disable the SNMP module in the Contiki-NG build configuration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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Contiki-NG开源的一个适用于物联网中资源受限设备的操作系统。 Contiki-NG存在缓冲区错误漏洞，该漏洞源于向运行启用了 SNMP 的 Contiki-NG 操作系统的设备发送数据包时，可能会触发 1 字节的越界读取。
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 <= 4.9 -

II. Public POCs for CVE-2024-41125

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 11616 chars
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III. Intelligence Information for CVE-2024-41125

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Vendor Advisories for CVE-2024-41125 (1)

Same Patch Batch · contiki-ng · 2024-11-27 · 4 CVEs total

CVE-2024-41126 8.4 HIGH Out-of-bounds read when decoding SNMP messages in Contiki-NG
CVE-2024-47181 7.5 HIGH Unaligned memory access in RPL option processing in Contiki-NG
CVE-2023-29001 Uncontrolled recursion due to insufficient validation of the IPv6 source routing header in

IV. Related Vulnerabilities

Same product: contiki-ng
Same vendor: contiki-ng
Same weakness: CWE-125

V. Comments for CVE-2024-41125

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