煎饼 发表于 2021-12-15 10:10:25

Apache Log4j2 远程代码执行漏洞

漏洞描述Apache Log4j2 是一个基于 Java 的日志记录工具。该工具重写了 Log4j 框架,并且引入了大量丰富的特性。该日志框架被大量用于业务系统开发,用来记录日志信息。在大多数情况下,开发者可能会将用户输入导致的错误信息写入日志中。攻击者利用此特性可通过该漏洞构造特殊的数据请求包,最终触发远程代码执行。由于该漏洞影响范围极广,建议广大用户及时排查相关漏洞,经过白帽汇安全研究院分析确认,目前市面有多款流行的系统都受影响。该漏洞危害等级:严重影响范围Apache Log4j 2.x < 2.15.0-rc2已知影响组件
[*]Apache Struts2
[*]Apache Solr
[*]Apache Flink
[*]Apache Druid
[*]flume
[*]dubbo
[*]logstash
[*]VMware Horizon
[*]VMware vCenter Server
[*]VMware HCX
[*]VMware NSX-T Data Center
[*]VMware Unified Access Gateway
[*]VMware WorkspaceOne Access
[*]VMware Identity Manager`
[*]VMware vRealize Operations
[*]VMware vRealize Operations Cloud Proxy
[*]VMware vRealize Log Insight
[*]VMware vRealize Automation
[*]VMware vRealize Lifecycle Manager
[*]VMware Telco Cloud Automation
[*]VMware Site Recovery Manager
[*]VMware Carbon Black Cloud Workload Appliance
[*]VMware Carbon Black EDR Server
[*]VMware Tanzu GemFire
[*]VMware Tanzu Greenplum
[*]VMware Tanzu Operations Manager
[*]VMware Tanzu Application Service for VMs
[*]VMware Tanzu Kubernetes Grid Integrated Edition
[*]VMware Tanzu Observability by Wavefront Nozzle
[*]Healthwatch for Tanzu Application Service
[*]Spring Cloud Services for VMware Tanzu
[*]Spring Cloud Gateway for VMware Tanzu
[*]Spring Cloud Gateway for Kubernetes
[*]API Portal for VMware Tanzu
[*]Single Sign-On for VMware Tanzu Application Service
[*]App Metrics
[*]VMware vCenter Cloud Gateway
[*]VMware Tanzu SQL with MySQL for VMs
[*]VMware vRealize Orchestrator
[*]VMware Cloud Foundation
[*]VMware Workspace ONE Access Connector
[*]VMware Horizon DaaS
[*]VMware Horizon Cloud Connector
受影响开源组件
项目仓库地址版本
elasticsearch(org.elasticsearch)https://github.com/elastic/elasticsearch8.0.0-alpha2 等(共 100 个)
spring-webflux(org.springframework)https://github.com/spring-projects/spring-framework5.2.6.RELEASE 等(共 40 个)
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hystrix-rx-netty-metrics-stream(com.netflix.hystrix)https://github.com/Netflix/Hystrix1.5.4 等(共 2 个)
spring-cloud-starter-alibaba-sentinel(com.alibaba.cloud)https://github.com/alibaba/spring-cloud-alibaba2021.1 等(共 14 个)
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elasticsearch-sql(org.nlpcn)https://github.com/NLPchina/elasticsearch-sql6.8.13.0 等(共 9 个)
exposed-spring-boot-starter(org.jetbrains.exposed)https://github.com/JetBrains/Exposed0.36.2 等(共 11 个)
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lettuce-core(io.lettuce)https://github.com/lettuce-io/lettuce-core6.1.5.RELEASE 等(共 42 个)
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breeze-parent_2.13(org.scalanlp)https://github.com/scalanlp/breeze2.0.1-RC1 等(共 5 个)
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elasticsearch-hadoop(org.elasticsearch)https://github.com/elastic/elasticsearch-hadoop8.0.0-beta1 等(共 100 个)
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reactor-netty(io.projectreactor.netty)https://github.com/reactor/reactor-netty1.0.9 等(共 75 个)
evcache-client-sample(com.netflix.evcache)https://github.com/Netflix/EVCache5.18.9 等(共 63 个)
xtdb-test(com.xtdb)https://github.com/xtdb/xtdb1.20.0 等(共 9 个)
transport-netty4(com.strapdata.elasticsearch.plugin)https://github.com/strapdata/elassandra6.2.3.31 等(共 14 个)
sbt-metals(org.scalameta)https://github.com/scalameta/metals0.9.9 等(共 17 个)
elastic4s-embedded_2.12(com.sksamuel.elastic4s)https://github.com/sksamuel/elastic4s6.7.8 等(共 100 个)
genie-agent(com.netflix.genie)https://github.com/Netflix/genie4.0.4 等(共 100 个)
spring-kafka(org.springframework.kafka)https://github.com/spring-projects/spring-kafka2.7.9 等(共 79 个)
db-async-common_2.13(com.dripower)https://github.com/mauricio/postgresql-async0.3.109 等(共 19 个)
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discord4j-rest(com.discord4j)https://github.com/Discord4J/Discord4J3.2.1 等(共 15 个)
twitter-server-logback-classic_2.13(com.twitter)https://github.com/twitter/twitter-server21.9.0 等(共 54 个)
synthea(org.mitre.synthea)https://github.com/synthetichealth/synthea2.7.0 等(共 2 个)
spring-integration-redis(org.springframework.integration)https://github.com/spring-projects/spring-integration5.5.6 等(共 30 个)
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akka-stream-alpakka-geode_2.12(com.lightbend.akka)https://github.com/akka/alpakka1.0-M1 等(共 13 个)
mantis-client(io.mantisrx)https://github.com/Netflix/mantis1.3.9 等(共 83 个)
mybatis-generator-plugin(com.itfsw)https://github.com/itfsw/mybatis-generator-plugin1.2.9 等(共 31 个)
ktorm-support-sqlserver(org.ktorm)https://github.com/kotlin-orm/ktorm3.3.0 等(共 11 个)
gatk(org.broadinstitute)https://github.com/broadinstitute/gatk4.beta.2 等(共 39 个)
azure-messaging-servicebus(com.azure)https://github.com/Azure/azure-sdk-for-java7.5.1 等(共 100 个)
mica-metrics(net.dreamlu)https://github.com/lets-mica/mica2.5.7 等(共 7 个)
shiro-redis(org.crazycake)https://github.com/alexxiyang/shiro-redis3.3.1 等(共 2 个)
enumeratum-play_2.12(com.beachape)https://github.com/lloydmeta/enumeratum1.5.16 等(共 2 个)
jdonframework(org.jdon)https://github.com/banq/jdonframework6.6.8 等(共 1 个)
weid-java-sdk(com.webank)https://github.com/WeBankBlockchain/WeIdentity1.8.1 等(共 3 个)
log-protocol(io.shulie.pradar)https://github.com/shulieTech/Takin2.0.3 等(共 3 个)
micro-boot(com.oath.microservices)https://github.com/aol/micro-server1.2.6 等(共 38 个)
sparkling-water-package_2.11(ai.h2o)https://github.com/h2oai/sparkling-water2.4.10 等(共 36 个)
scalatest_2.13(au.com.dius.pact.provider)https://github.com/pact-foundation/pact-jvm4.2.4 等(共 5 个)
mssql-jdbc(com.microsoft.sqlserver)https://github.com/microsoft/mssql-jdbc8.3.0.jre11-preview 等(共 100 个)
elide-spring-boot-starter(com.yahoo.elide)https://github.com/yahoo/elide6.0.3 等(共 45 个)
kafka-connect-elastic5(com.datamountaineer)https://github.com/lensesio/stream-reactor1.2.0 等(共 5 个)
kvision-server-spring-boot-jvm(io.kvision)https://github.com/rjaros/kvision5.4.3 等(共 9 个)
r2dbc-postgresql(org.postgresql)https://github.com/pgjdbc/r2dbc-postgresql0.9.0.RC1 等(共 8 个)
play-slick-evolutions_2.13(com.typesafe.play)https://github.com/playframework/play-slick5.0.0-RC3 等(共 29 个)
sbt-bloop-core(ch.epfl.scala)https://github.com/scalacenter/bloop1.4.8-43-c2d941d9 等(共 29 个)
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更多受影响组件查询,请点击以下链接查询:https://log4j2.huoxian.cn/漏洞排查代码排查:查看 pom.xml 是否引入 org.apache.logging.log4j、org.apache.logging.log4j2https://nosec.org/avatar/uploads/attach/image/a14f07d166734b7a532f16cdcd353fa7/1.pngLinux:sudo find / -name "*log4j-*.jar"https://nosec.org/avatar/uploads/attach/image/1da0e92f55a5f01ade6d179ba37a97d1/2.pngWindows:*log4j*.jarhttps://nosec.org/avatar/uploads/attach/image/b1b90a6090f3ca1ccd6f20c449d8b5c3/3.png攻击排查日志排查:攻击者在利用前通常采用dnslog方式进行扫描、探测,对于常见利用方式可通过应用系统报错日志中的"javax.naming.CommunicationException""javax.naming.NamingException: problem generating object using object factory""Error looking up JNDI resource"关键字进行排查。流量排查:攻击者的数据包中可能存在:“${jndi:rmi”、“${jndi:ldap”字样,可根据此类关键字进行排查。漏洞复现https://nosec.org/avatar/uploads/attach/image/6e6f1ade2cd657e19484d6cb50d32755/log4j2.pngVulfocus 靶场环境目前 Vulfocus 已经集成 Log4j2 环境,可通过以下链接启动环境测试:http://vulfocus.fofa.so/#/dashboard?image_id=3b8f15eb-7bd9-49b2-a69e-541f89c4216c也可通过 docker pull vulfocus/log4j2-rce-2021-12-09:latest 拉取本地环境运行,本地启动命令:docker run -d -P vulfocus/log4j2-rce-2021-12-09:latesthttps://nosec.org/avatar/uploads/attach/image/4265ccf1647bb441c9b33deea5d50ffd/vulfocus.png修复建议1、禁止使用 log4j 服务器外连,升级 idk 11.0.1 8u191 7u201 6u211 或更高版本。2、升级至 log4j-2.15.0-rc2:   下载地址:https://github.com/apache/logging-log4j2/releases/tag/log4j-2.15.0-rc23、紧急缓解措施:(1) 修改 jvm 参数 -Dlog4j2.formatMsgNoLookups=true(2) 修改配置 log4j2.formatMsgNoLookups=True(3) 将系统环境变量 FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS 设置 为 true参考 https://github.com/apache/logging-log4j2/releases/tag/log4j-2.15.0-rc1 Limit the protocols jNDI can use and restrict LDAP. - ASF JIRA (apache.org) ASF Git Repos - logging-log4j2.git/blob - log4j-core/src/test/java/org/apache/logging/log4j/core/lookup/JndiRestrictedLookupTest.java https://mp.weixin.qq.com/s/wC7mrK1Y4DYz9_yW4fLzbw https://help.aliyun.com/noticelist/articleid/1060971232.html https://mp.weixin.qq.com/s/C4zeXHKHDqPeRuLytO7Fzw
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