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CVE-2022-35926— Out-of-bounds read in IPv6 neighbor solicitation in Contiki-NG

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之前版本存在缓冲区错误漏洞，该漏洞源于Contiki-NG 中 IPv6 网上邻居发现选项的验证不充分，攻击者利用该漏洞可以发送触发越界读取的请求数据包。

CVSS 5.9 · Medium EPSS 1.19% · P65

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2022-35926

Vulnerability Information
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Vulnerability Title
Out-of-bounds read in IPv6 neighbor solicitation in Contiki-NG
Source: CVE Program / CVE List V5
Vulnerability Description
Contiki-NG is an open-source, cross-platform operating system for IoT devices. Because of insufficient validation of IPv6 neighbor discovery options in Contiki-NG, attackers can send neighbor solicitation packets that trigger an out-of-bounds read. The problem exists in the module os/net/ipv6/uip-nd6.c, where memory read operations from the main packet buffer, <code>uip_buf</code>, are not checked if they go out of bounds. In particular, this problem can occur when attempting to read the 2-byte option header and the Source Link-Layer Address Option (SLLAO). This attack requires ipv6 be enabled for the network. The problem has been patched in the develop branch of Contiki-NG. The upcoming 4.8 release of Contiki-NG will include the patch.Users unable to upgrade may apply the patch in Contiki-NG PR #1654.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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之前版本存在缓冲区错误漏洞，该漏洞源于Contiki-NG 中 IPv6 网上邻居发现选项的验证不充分，攻击者利用该漏洞可以发送触发越界读取的请求数据包。
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-2022-35926

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III. Intelligence Information for CVE-2022-35926

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Patches & Fixes for CVE-2022-35926 (2)

Vendor Advisories for CVE-2022-35926 (1)

Other References for CVE-2022-35926 (1)

Same Patch Batch · contiki-ng · 2022-08-04 · 3 CVEs total

CVE-2021-32771 8.1 HIGH Buffer overflow in contiki-ng
CVE-2022-35927 8.1 HIGH Unverified DIO prefix info lengths in RPL-Classic in Contiki-NG

IV. Related Vulnerabilities

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

V. Comments for CVE-2022-35926

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