CVE-2020-17525— Remote unauthenticated denial-of-service in Subversion mod_authz_svn
Quick assessment
Affected
Apache Software Foundation Apache Subversion
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.
Apache Subversion是美国阿帕奇（Apache）基金会的一套开源的版本控制系统。该系统可兼容并发版本系统(CVS)。 Apache Subversion 存在代码问题漏洞，攻击者可利用该漏洞通过mod authz svn可以触发一个致命错误，为了触发拒绝服务。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-17525
Vulnerability Information
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Vulnerability Title
Remote unauthenticated denial-of-service in Subversion mod_authz_svn
Source: CVE Program / CVE List V5
Vulnerability Description
Subversion's mod_authz_svn module will crash if the server is using in-repository authz rules with the AuthzSVNReposRelativeAccessFile option and a client sends a request for a non-existing repository URL. This can lead to disruption for users of the service. This issue was fixed in mod_dav_svn+mod_authz_svn servers 1.14.1 and mod_dav_svn+mod_authz_svn servers 1.10.7
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Subversion 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Subversion是美国阿帕奇（Apache）基金会的一套开源的版本控制系统。该系统可兼容并发版本系统(CVS)。 Apache Subversion 存在代码问题漏洞，攻击者可利用该漏洞通过mod authz svn可以触发一个致命错误，为了触发拒绝服务。
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 |
|---|---|---|---|---|
| Apache Software Foundation | Apache Subversion | mod_authz_svn 1.10.7 | - |
|
II. Public POCs for CVE-2020-17525
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2020-17525 (1)
Other References for CVE-2020-17525 (1)
-
https://subversion.apache.org/security/CVE-2020-17525-advisory.txt x_refsource_MISC
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V. Comments for CVE-2020-17525
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