CVE-2021-44421
Quick assessment
Affected
n/a n/a
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.
Occlum是一个适用于英特尔 SGX 的内存安全、多进程库操作系统。 Occlum for Intel SGX 0.26.0 之前版本中 util/mem_util.rs 存在安全漏洞，该漏洞源于指针验证逻辑充当混淆代理。允许本地攻击者通过边信道分析访问未经授权的信息。
Possible ATT&CK Techniques 1 AI
T1570 · Lateral Tool Transfer
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I. Basic Information for CVE-2021-44421
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The pointer-validation logic in util/mem_util.rs in Occlum before 0.26.0 for Intel SGX acts as a confused deputy that allows a local attacker to access unauthorized information via side-channel analysis.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Occlum 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Occlum是一个适用于英特尔 SGX 的内存安全、多进程库操作系统。 Occlum for Intel SGX 0.26.0 之前版本中 util/mem_util.rs 存在安全漏洞，该漏洞源于指针验证逻辑充当混淆代理。允许本地攻击者通过边信道分析访问未经授权的信息。
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 |
|---|---|---|---|---|
| - | n/a | n/a | - |
|
II. Public POCs for CVE-2021-44421
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-44421 (1)
-
https://github.com/occlum/occlum/commit/36918e42bf6732c4d3996bc99eb013eb6b90b249 x_refsource_CONFIRM
Other References for CVE-2021-44421 (3)
-
https://github.com/occlum/occlum/compare/0.25.0...v0.26.0 x_refsource_CONFIRM
Same Patch Batch · n/a · 2022-03-06 · 7 CVEs total
| CVE-2022-26495 | nbd 输入验证错误漏洞 | |
| CVE-2022-26496 | nbd 缓冲区错误漏洞 | |
| CVE-2022-26505 | ReadyMedia 安全漏洞 | |
| CVE-2022-26490 | Linux kernel 安全漏洞 | |
| CVE-2021-46703 | Antaris RazorEngine 安全漏洞 | |
| CVE-2021-46704 | GenieACS 操作系统命令注入漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-44421
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