CVE-2021-41524— null pointer dereference in h2 fuzzing
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I. Basic Information for CVE-2021-41524
Vulnerability Information
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Vulnerability Title
null pointer dereference in h2 fuzzing
Source: NVD (National Vulnerability Database)
Vulnerability Description
While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache HTTP Server 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 2.4.49版本存在代码问题漏洞，该漏洞源于在HTTP/2请求处理期间检测到新的空指针解引用，从而允许外部源对服务器进行拒绝服务攻击。
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 | 2.4.49 | - |
II. Public POCs for CVE-2021-41524
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
- https://security.netapp.com/advisory/ntap-20211029-0009/x_refsource_CONFIRM
- Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo securityvendor-advisoryx_refsource_GENTOO
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/vendor-advisoryx_refsource_FEDORA
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2021-41524
IV. Related Vulnerabilities
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Same vendor: Apache Software Foundation
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Same weakness: CWE-476
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V. Comments for CVE-2021-41524
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