CVE-2021-3321— Integer Underflow in Zephyr in IEEE 802154 Fragment Reassembly Header Removal
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是美国Linux基金会的一套开源的小型的可缩放的实时操作系统。 Zephyr存在数字错误漏洞，该漏洞源于IEEE 802154中Zephyr的整数下流片段重组头部移除。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-3321
Vulnerability Information
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Vulnerability Title
Integer Underflow in Zephyr in IEEE 802154 Fragment Reassembly Header Removal
Source: CVE Program / CVE List V5
Vulnerability Description
Integer Underflow in Zephyr in IEEE 802154 Fragment Reassembly Header Removal. Zephyr versions >= >=2.4.0 contain Integer Overflow to Buffer Overflow (CWE-680). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w44j-66g7-xw99
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出导致缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Zephyr 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zephyr是美国Linux基金会的一套开源的小型的可缩放的实时操作系统。 Zephyr存在数字错误漏洞，该漏洞源于IEEE 802154中Zephyr的整数下流片段重组头部移除。
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 | >=2.4.0 ~ unspecified | - |
|
II. Public POCs for CVE-2021-3321
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-3321 (1)
Same Patch Batch · zephyrproject-rtos · 2021-10-12 · 4 CVEs total
| CVE-2021-3323 | 8.3 HIGH | Integer Underflow in 6LoWPAN IPHC Header Uncompression in Zephyr |
| CVE-2021-3330 | 7.1 HIGH | RCE/DOS: Linked-list corruption leading to large out-of-bounds write while sorting for for |
| CVE-2021-3322 | 6.5 MEDIUM | Unexpected Pointer Aliasing in IEEE 802154 Fragment Reassembly in Zephyr |
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