CVE-2021-33503
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.
urllib3是一款Python HTTP库。该产品具有线程安全连接池、文件发布支持等。 Urllib3 存在资源管理错误漏洞，该漏洞源于在鉴权模块的URL中添加@参数导致，攻击者可利用该漏洞引起资源冲突导致拒绝服务。以下产品及型号会受到影响：Urllib3 0.3, 0.3.1, 0.4, 0.4.1, 1.0, 1.0.1, 1.0.2, 1.1, 1.2, 1.2.1, 1.3, 1.4, 1.5, 1.6, 1.7, 1.7.1, 1.8, 1.8.1, 1.8.2, 1.8.3, 1.9, 1.
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-33503
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.
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
urllib3 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
urllib3是一款Python HTTP库。该产品具有线程安全连接池、文件发布支持等。 Urllib3 存在资源管理错误漏洞，该漏洞源于在鉴权模块的URL中添加@参数导致，攻击者可利用该漏洞引起资源冲突导致拒绝服务。以下产品及型号会受到影响：Urllib3 0.3, 0.3.1, 0.4, 0.4.1, 1.0, 1.0.1, 1.0.2, 1.1, 1.2, 1.2.1, 1.3, 1.4, 1.5, 1.6, 1.7, 1.7.1, 1.8, 1.8.1, 1.8.2, 1.8.3, 1.9, 1.
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 | - |
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II. Public POCs for CVE-2021-33503
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-33503 (1)
Vendor Advisories for CVE-2021-33503 (2)
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https://www.oracle.com/security-alerts/cpuoct2021.html x_refsource_MISC
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Mailing List Discussions for CVE-2021-33503 (2)
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/ vendor-advisory x_refsource_FEDORA
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/ vendor-advisory x_refsource_FEDORA
Other References for CVE-2021-33503 (1)
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https://github.com/advisories/GHSA-q2q7-5pp4-w6pg x_refsource_CONFIRM
Same Patch Batch · n/a · 2021-06-29 · 28 CVEs total
| CVE-2021-23400 | 6.3 MEDIUM | HTTP Header Injection |
| CVE-2021-20102 | Machform 跨站请求伪造漏洞 | |
| CVE-2021-34548 | Tor 信息泄露漏洞 | |
| CVE-2021-34549 | Arch Linux 资源管理错误漏洞 | |
| CVE-2021-34550 | Tor 缓冲区错误漏洞 | |
| CVE-2021-31160 | ZOHO ManageEngine ServiceDesk Plus 安全漏洞 | |
| CVE-2021-31530 | ZOHO ManageEngine ServiceDesk Plus 信息泄露漏洞 | |
| CVE-2021-31531 | ZOHO ManageEngine ServiceDesk Plus 代码问题漏洞 | |
| CVE-2021-34824 | Istio 权限许可和访问控制问题漏洞 | |
| CVE-2021-32990 | winproladder 缓冲区错误漏洞 | |
| CVE-2021-32992 | winproladder 缓冲区错误漏洞 | |
| CVE-2021-32988 | winproladder 缓冲区错误漏洞 | |
| CVE-2021-21871 | PowerISO 缓冲区错误漏洞 | |
| CVE-2021-20101 | Machform 注入漏洞 | |
| CVE-2021-35941 | Western Digital WD My Book Live 访问控制错误漏洞 | |
| CVE-2021-20103 | Machform 跨站脚本漏洞 | |
| CVE-2021-20104 | Machform 代码问题漏洞 | |
| CVE-2021-20105 | Machform 输入验证错误漏洞 | |
| CVE-2021-22119 | VMware Spring Security 安全漏洞 | |
| CVE-2020-21394 | Zhongbang CRMEB SQL注入漏洞 |
Showing top 20 of 28 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2021-33503
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