CVE-2021-34798— NULL pointer dereference in httpd core
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I. Basic Information for CVE-2021-34798
Vulnerability Information
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Vulnerability Title
NULL pointer dereference in httpd core
Source: NVD (National Vulnerability Database)
Vulnerability Description
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
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 2.4.48及之前版本存在代码问题漏洞，该漏洞源于格式错误的请求可能会导致服务器取消对NULL指针的引用。
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 | Apache HTTP Server 2.4 ~ 2.4.48 | - |
II. Public POCs for CVE-2021-34798
| # | POC Description | Source Link | Shenlong Link |
|---|
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- http://httpd.apache.org/security/vulnerabilities_24.htmlx_refsource_MISC
- https://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC
- https://kc.mcafee.com/corporate/index?page=content&id=SB10379x_refsource_CONFIRM
- https://www.tenable.com/security/tns-2021-17x_refsource_CONFIRM
- https://security.netapp.com/advisory/ntap-20211008-0004/x_refsource_CONFIRM
- https://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
- Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo securityvendor-advisoryx_refsource_GENTOO
- 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2021-34798
Same Patch Batch · Apache Software Foundation · 2021-09-16 · 6 CVEs total
| CVE-2021-41079 | Apache Tomcat DoS with unexpected TLS packet | |
| CVE-2021-40438 | mod_proxy SSRF | |
| CVE-2021-39275 | ap_escape_quotes buffer overflow | |
| CVE-2021-39239 | XML External Entity (XXE) vulnerability | |
| CVE-2021-36160 | mod_proxy_uwsgi out of bound read |
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