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CVE-2020-13950— mod_proxy_http NULL pointer dereference

Quick assessment

Affected
Apache Software Foundation Apache HTTP Server
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.

EasyApache是Apache基金会的一个功能强大且易于使用的工具，内置在WHM/cPanel中，可以使用它来更新和配置Apache web服务器。 EasyApache 存在代码问题漏洞，该漏洞允许远程攻击者执行拒绝服务(DoS)攻击。以下产品及版本受到影响：EasyApache: 4 2017-5-16, 4 2017-6-13, 4 2017-6-21, 4 2017-7-11, 4 2017-7-18, 4 2017-8-8, 4 2017-8-17, 4 2017-9-6, 4 2017-9

AI Predicted 5.3 Difficulty: Easy EPSS 49.37% · P99

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-13950

Vulnerability Information
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Vulnerability Title
mod_proxy_http NULL pointer dereference
Source: CVE Program / CVE List V5
Vulnerability Description
Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service
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
EasyApache 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EasyApache是Apache基金会的一个功能强大且易于使用的工具，内置在WHM/cPanel中，可以使用它来更新和配置Apache web服务器。 EasyApache 存在代码问题漏洞，该漏洞允许远程攻击者执行拒绝服务(DoS)攻击。以下产品及版本受到影响：EasyApache: 4 2017-5-16, 4 2017-6-13, 4 2017-6-21, 4 2017-7-11, 4 2017-7-18, 4 2017-8-8, 4 2017-8-17, 4 2017-9-6, 4 2017-9
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
Apache Software Foundation Apache HTTP Server 2.4.46 -

II. Public POCs for CVE-2020-13950

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III. Intelligence Information for CVE-2020-13950

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Vendor Advisories for CVE-2020-13950 (4)

Mailing List Discussions for CVE-2020-13950 (5)

Same Patch Batch · Apache Software Foundation · 2021-06-10 · 7 CVEs total

CVE-2021-30641 Unexpected URL matching with 'MergeSlashes OFF'
CVE-2021-26691 Apache HTTP Server mod_session response handling heap overflow
CVE-2021-26690 mod_session NULL pointer dereference
CVE-2020-35452 mod_auth_digest possible stack overflow by one nul byte
CVE-2020-13938 Improper Handling of Insufficient Privileges
CVE-2019-17567 mod_proxy_wstunnel tunneling of non Upgraded connections

IV. Related Vulnerabilities

Same product: Apache HTTP Server
Same vendor: Apache Software Foundation

V. Comments for CVE-2020-13950

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