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CVE-2022-1841— Out-of-bound write in tcp_flags

Quick assessment

Affected
zephyrproject-rtos zephyr
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.

Zephyr是Zephyr Project开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr 3.0版本及之前版本存在安全漏洞，该漏洞源于在 subsys/net/ip/tcp.c 的 tcp_flags 函数中，当传入参数 flags 为 ECN或 CWR 时，buf 将越界写入一个字节零。

CVSS 7.2 · High EPSS 0.58% · P48

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2022-1841

Vulnerability Information
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Vulnerability Title
Out-of-bound write in tcp_flags
Source: CVE Program / CVE List V5
Vulnerability Description
In subsys/net/ip/tcp.c , function tcp_flags , when the incoming parameter flags is ECN or CWR , the buf will out-of-bounds write a byte zero.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Zephyr 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zephyr是Zephyr Project开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr 3.0版本及之前版本存在安全漏洞，该漏洞源于在 subsys/net/ip/tcp.c 的 tcp_flags 函数中，当传入参数 flags 为 ECN或 CWR 时，buf 将越界写入一个字节零。
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
zephyrproject-rtos zephyr unspecified ~ v3.0 -

II. Public POCs for CVE-2022-1841

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III. Intelligence Information for CVE-2022-1841

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Vendor Advisories for CVE-2022-1841 (1)

IV. Related Vulnerabilities

Same product: zephyr
Same vendor: zephyrproject-rtos
Same weakness: CWE-787