CVE-2020-13950— mod_proxy_http NULL pointer dereference
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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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|---|
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- https://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
- http://httpd.apache.org/security/vulnerabilities_24.htmlx_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210702-0001/x_refsource_CONFIRM
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2020-13950
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
- CVE-2026-28780
Apache HTTP Server: buffer overflow in mod_proxy_ajp via aj - CVE-2026-29168
Apache HTTP Server: mod_md unrestricted OCSP response - CVE-2026-29169
Apache HTTP Server: mod_dav_lock indirect lock crash - CVE-2026-23918
Apache HTTP Server: http2: double free and possible RCE on e - CVE-2026-33006
Apache HTTP Server: mod_auth_digest timing attack
Same vendor: Apache Software Foundation
- CVE-2026-39816
Apache NiFi: Missing Execute Code Required Permission on Tin - CVE-2026-25199
Apache CloudStack: Proxmox Extension Allows Unauthorized Cro - CVE-2026-25077
Apache CloudStack: Unauthenticated Command Injection in Dire - CVE-2025-69233
Apache CloudStack: Domain/account resources limits not honor - CVE-2025-66467
Apache CloudStack: MinIO policy remains intact on bucket del
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