CVE-2020-7212
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 library 1.25.2版本至1.25.7版本（Python）中的util/url.py文件的‘_encode_invalid_chars’函数存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2020-7212
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The _encode_invalid_chars function in util/url.py in the urllib3 library 1.25.2 through 1.25.7 for Python allows a denial of service (CPU consumption) because of an inefficient algorithm. The percent_encodings array contains all matches of percent encodings. It is not deduplicated. For a URL of length N, the size of percent_encodings may be up to O(N). The next step (normalize existing percent-encoded bytes) also takes up to O(N) for each step, so the total time is O(N^2). If percent_encodings were deduplicated, the time to compute _encode_invalid_chars would be O(kN), where k is at most 484 ((10+6*2)^2).
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 library 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 library 1.25.2版本至1.25.7版本（Python）中的util/url.py文件的‘_encode_invalid_chars’函数存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。
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-2020-7212
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2020-7212 (1)
Other References for CVE-2020-7212 (2)
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https://github.com/urllib3/urllib3/blob/master/CHANGES.rst x_refsource_MISC
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https://pypi.org/project/urllib3/1.25.8/ x_refsource_MISC
Same Patch Batch · n/a · 2020-03-06 · 22 CVEs total
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| CVE-2020-8635 | Wing FTP Server 安全漏洞 | |
| CVE-2020-10212 | Tecrail Responsive FileManager 代码问题漏洞 | |
| CVE-2019-19772 | 多款Lexmark产品跨站脚本漏洞 | |
| CVE-2019-19773 | 多款Lexmark产品跨站脚本漏洞 | |
| CVE-2020-10112 | Citrix Systems Gateway 环境问题漏洞 | |
| CVE-2020-10111 | Citrix Systems Gateway 环境问题漏洞 | |
| CVE-2020-10110 | Citrix Systems Gateway 安全漏洞 | |
| CVE-2020-10193 | 多款ESET产品输入验证错误漏洞 | |
| CVE-2020-9458 | WordPress RegistrationMagic 安全漏洞 | |
| CVE-2019-20503 | usrsctp 缓冲区错误漏洞 | |
| CVE-2020-9456 | WordPress RegistrationMagic 安全漏洞 | |
| CVE-2020-9455 | WordPress RegistrationMagic 安全漏洞 | |
| CVE-2020-9454 | WordPress RegistrationMagic 跨站请求伪造漏洞 | |
| CVE-2020-8113 | GitLab 安全漏洞 | |
| CVE-2020-9531 | Xiaomi MIUI 信息泄露漏洞 | |
| CVE-2020-9530 | Xiaomi MIUI 信息泄露漏洞 | |
| CVE-2020-10189 | ZOHO ManageEngine Desktop Central 代码问题漏洞 | |
| CVE-2020-9756 | Patriot Viper RGB Driver 安全漏洞 |
Showing top 20 of 22 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2020-7212
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