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CVE-2021-20322

Quick assessment

Affected
n/a kernel
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，攻击者可利用该漏洞可以绕过对Linux内核数据的访问限制，通过ICMP错误开放UDP端口，以读取敏感信息。

AI Predicted 7.5 Difficulty: Hard EPSS 6.90% · P94

Affected Version Matrix 5

VendorProduct Version RangeStatus
n/a kernel 4.15< 4.19.215 affected
4.20< 5.4.146 affected
5.5< 5.10.65 affected
5.11< 5.13.17 affected
5.14< 5.14.4 affected
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I. Basic Information for CVE-2021-20322

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用不充分的随机数
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，攻击者可利用该漏洞可以绕过对Linux内核数据的访问限制，通过ICMP错误开放UDP端口，以读取敏感信息。
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
- kernel 4.15 ~ 4.19.215 -

II. Public POCs for CVE-2021-20322

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III. Intelligence Information for CVE-2021-20322

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Patches & Fixes for CVE-2021-20322 (4)

Vendor Advisories for CVE-2021-20322 (4)

Same Patch Batch · n/a · 2022-02-18 · 66 CVEs total

CVE-2022-25299 9.8 CRITICAL Arbitrary File Write
CVE-2021-23702 7.6 HIGH Prototype Pollution
CVE-2022-25298 7.5 HIGH Path Traversal
CVE-2021-46062 MingSoft MCMS 安全漏洞
CVE-2022-25134 TotoLink routers 命令注入漏洞
CVE-2022-25135 TotoLink routers 命令注入漏洞
CVE-2022-25133 TotoLink routers 命令注入漏洞
CVE-2021-46110 Online Shopping Portal 安全漏洞
CVE-2021-46082 Moxa Tn-5900 安全漏洞
CVE-2021-46063 MingSoft MCMS 代码代码注入漏洞
CVE-2021-40841 LiveConfig 路径遍历漏洞
CVE-2021-46037 MingSoft MCMS 安全漏洞
CVE-2021-46036 MingSoft MCMS 代码问题漏洞
CVE-2021-30650 Broadcom Symantec Layer7 API Management OAuth Toolkit跨站脚本漏洞
CVE-2020-8242 Packet Tide ExpressionEngine 安全漏洞
CVE-2021-3657 Sourceforge mbsync 缓冲区错误漏洞
CVE-2021-3947 QEMU 缓冲区错误漏洞
CVE-2021-3930 QEMU 安全漏洞
CVE-2021-20325 Red Hat Enterprise Linux 代码问题漏洞
CVE-2021-20321 Linux kernel 竞争条件问题漏洞

Showing top 20 of 66 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-330

V. Comments for CVE-2021-20322

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