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Apache Log4j2 远程代码执行漏洞

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    发表于 2021-12-15 10:10:25 | 只看该作者 |只看大图 回帖奖励 |倒序浏览 |阅读模式
    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
      , d2 Z& j4 B% e5 t
    受影响开源组件
    项目
    仓库地址
    版本
    - |2 v& }0 l7 C" c
    elasticsearch(org.elasticsearch)https://github.com/elastic/elasticsearch8.0.0-alpha2 等(共 100 个)1 J" ~: B. K! a
    spring-webflux(org.springframework)https://github.com/spring-projects/spring-framework5.2.6.RELEASE 等(共 40 个)
    ; W4 Z3 a8 q4 A, ^% idruid(com.alibaba)https://github.com/alibaba/druid1.2.8 等(共 68 个). k+ N  F0 p/ q# @; i
    hystrix-rx-netty-metrics-stream(com.netflix.hystrix)https://github.com/Netflix/Hystrix1.5.4 等(共 2 个)8 y$ c; d# P2 g; w0 ~/ E2 Y
    spring-cloud-starter-alibaba-sentinel(com.alibaba.cloud)https://github.com/alibaba/spring-cloud-alibaba2021.1 等(共 14 个)
    $ l5 s' P% R9 g# I/ f9 v4 wspring-boot-starter-ahas-sentinel-client(com.alibaba.csp)https://github.com/alibaba/Sentinel1.3.2 等(共 17 个)
    . y) w% R) i$ G+ ~& oredisson(org.redisson)https://github.com/redisson/redisson2.2.24 等(共 3 个)3 p$ K4 `; X% ], w  P0 a
    HikariCP(com.zaxxer)https://github.com/brettwooldridge/HikariCP5.0.0 等(共 27 个)
    & m- u6 U) q3 I8 O7 r1 r( Zzipkin-collector-service(io.zipkin)https://github.com/openzipkin/zipkin1.40.2 等(共 27 个)
    ' p( ]0 {5 ^  _7 X& ]mybatis-plus(com.baomidou)https://github.com/baomidou/mybatis-plus3.4.3.4 等(共 41 个)
    ! s$ Y) _1 c3 T3 wzuul-sample(com.netflix.zuul)https://github.com/Netflix/zuul2.3.0 等(共 10 个)
    ! e* H  R" L9 r2 K8 Iwatson-data-api-client(com.ibm.watson.data)https://github.com/OpenAPITools/openapi-generator0.1 等(共 1 个)
    2 ]1 I( r) Q5 Cspring-boot-admin-sample-consul(de.codecentric)https://github.com/codecentric/spring-boot-admin2.5.4 等(共 40 个)8 v9 `. g! X' R3 \( L; ~
    jedis(redis.clients)https://github.com/redis/jedisjedis-3.6.2 等(共 36 个), o7 ^2 c! M) e( s# r. S* C$ l- t
    grpc-benchmarks(io.grpc)https://github.com/grpc/grpc-java1.9.1 等(共 65 个)
    / S9 k  t7 H7 r* cktor-client-json-tests(io.ktor)https://github.com/ktorio/ktor1.6.7 等(共 32 个)
    7 z' i: S9 U& U" L3 {4 Kgitbucket_2.13(io.github.gitbucket)https://github.com/gitbucket/gitbucket4.32.0 等(共 27 个)
    4 T+ H" l! v* ^, A4 Hfinagle-zipkin_2.12(com.twitter)https://github.com/twitter/finagle7.1.0 等(共 56 个)
    % ?& b* A3 X* aresilience4j-vertx(io.github.resilience4j)https://github.com/resilience4j/resilience4j0.9.0 等(共 9 个). [! L. T2 \  I! Z6 p
    elasticsearch-sql(org.nlpcn)https://github.com/NLPchina/elasticsearch-sql6.8.13.0 等(共 9 个)1 R- s! q; Y( Y: \% d. B/ `
    exposed-spring-boot-starter(org.jetbrains.exposed)https://github.com/JetBrains/Exposed0.36.2 等(共 11 个)
    & I4 Q* U# Q/ h* j' _: H7 Cblade-sql2o(com.bladejava)https://github.com/lets-blade/blade1.2.9 等(共 1 个)
    " e1 q" D4 b) L+ Y/ a# ~netty-socketio(com.corundumstudio.socketio)https://github.com/mrniko/netty-socketio1.7.19 等(共 8 个)
    " {+ r/ X5 n& [2 X4 L! Gspringfox-swagger2(io.springfox)https://github.com/springfox/springfox2.10.5 等(共 6 个)* e1 ?8 w) a5 @& S: t7 W
    main_2.12(org.scala-sbt)https://github.com/sbt/sbt1.6.0-RC1 等(共 88 个)
    9 y* P+ Q) Z( e$ d% |" [lettuce-core(io.lettuce)https://github.com/lettuce-io/lettuce-core6.1.5.RELEASE 等(共 42 个)
    3 D) @; P4 K! M8 Grepository-azure(org.opensearch.plugin)https://github.com/opensearch-project/OpenSearch1.2.0 等(共 3 个)
    : l, p0 n, n4 ?! F3 I1 B  ureactor-test(io.projectreactor)https://github.com/reactor/reactor-core3.3.4.RELEASE 等(共 3 个)
    9 A8 U! [8 ~# O; |8 Fcorda-webserver-impl(net.corda)https://github.com/corda/cordacorda-3.0 等(共 32 个)
    + J! j3 K8 G" v) j" f7 [conductor-redis-persistence(com.netflix.conductor)https://github.com/Netflix/conductor3.3.6 等(共 100 个)
    # g9 [( m3 B5 F* ~( q8 t, t4 ^armeria(com.linecorp.armeria)https://github.com/line/armeria0.26.1.Final 等(共 2 个)3 Z' `* {: C+ m
    breeze-parent_2.13(org.scalanlp)https://github.com/scalanlp/breeze2.0.1-RC1 等(共 5 个)/ e6 a- R1 b) E; B
    micrometer-core(io.micrometer)https://github.com/micrometer-metrics/micrometer1.8.1 等(共 98 个)
    2 B- h3 \; P1 ?2 b; b7 l4 c7 {alink_connector_jdbc_sqlite_flink-1.9_2.11(com.alibaba.alink)https://github.com/alibaba/Alink1.5.1 等(共 3 个)
    # V6 \- w# [  ^. g$ _initializr-actuator(io.spring.initializr)https://github.com/spring-io/initializr0.9.0 等(共 6 个)9 d, H, A7 \( y- n
    telegrambots-spring-boot-starter(org.telegram)https://github.com/rubenlagus/TelegramBots4.9.1 等(共 17 个)
    2 O! V5 P2 e5 U! g5 T$ G+ Nspring-data-elasticsearch(org.springframework.data)https://github.com/spring-projects/spring-data-elasticsearch4.3.0 等(共 86 个)
    $ L. ~" x0 k! Mfeast-common(dev.feast)https://github.com/feast-dev/feast0.9.2 等(共 26 个)8 b3 b9 u% z! c  R5 V) ]6 }
    javamelody-core(net.bull.javamelody)https://github.com/javamelody/javamelody1.88.0 等(共 13 个)
    5 f, ~9 h  m9 d9 X  C/ L& yanalytics-zoo-bigdl_0.13.0-spark_3.0.0(com.intel.analytics.zoo)https://github.com/intel-analytics/analytics-zoo0.11.0-RC1 等(共 4 个)5 C9 G" N+ _& O& Z$ T7 b+ R! \
    scio-tensorflow_2.13(com.spotify)https://github.com/spotify/scio0.9.6 等(共 97 个)- q, W' @  j! Y7 v# e) G3 x9 s
    grpc-client-spring-boot-autoconfigure(net.devh)https://github.com/yidongnan/grpc-spring-boot-starter2.9.0.RELEASE 等(共 16 个)
    % D0 l  B$ n/ G* h' Q# }$ \inject-server_2.12(com.twitter)https://github.com/twitter/finatra21.9.0 等(共 56 个)
    6 W* e4 M: s3 z9 m# rclient-java-examples(io.kubernetes)https://github.com/kubernetes-client/java8.0.2 等(共 1 个)
    . {; G, [' G5 @9 M" M6 I' Zreactivesocket-tck-drivers(io.reactivesocket)https://github.com/rsocket/rsocket-java0.6.0 等(共 1 个)
    & V9 |' Y& \3 {- N4 a& U* Z6 M2 Zjest-droid(io.searchbox)https://github.com/searchbox-io/Jest6.3.1 等(共 8 个)
    . T$ D3 _% w! ~9 P( ~, @4 z/ N0 ]graphql-dgs-example-java-webflux(com.netflix.graphql.dgs)https://github.com/Netflix/dgs-framework4.9.7 等(共 36 个)
    % V% i5 a$ g3 I, K, _$ o! }: K, Dquill-jdbc-monix_2.11(io.getquill)https://github.com/getquill/quill3.9.0 等(共 62 个)" I7 D  R/ t% ]
    doobie-quill_2.12(org.tpolecat)https://github.com/tpolecat/doobie1.0.0-RC1 等(共 61 个)
    - K; G) W6 Q" i* yhttp4k(org.http4k)https://github.com/http4k/http4k4.3.4.1 等(共 3 个)0 r5 C0 ~* y* X& ~; j# P1 X
    elasticsearch-hadoop(org.elasticsearch)https://github.com/elastic/elasticsearch-hadoop8.0.0-beta1 等(共 100 个)2 N- C. A  w7 ~6 I8 J
    sbt-shading(io.get-coursier)https://github.com/coursier/coursier1.0.0-RC8 等(共 1 个); F; K8 c; b7 ?8 a$ h! U2 R
    spark-cassandra-connector-unshaded_2.10(com.datastax.spark)https://github.com/datastax/spark-cassandra-connector2.0.9 等(共 54 个)
    & V- }) |% ~' x2 B9 Mwebdrivermanager(io.github.bonigarcia)https://github.com/bonigarcia/webdrivermanager4.0.0 等(共 15 个)4 d9 E  M. M3 T# Z7 I
    common-auth-v3(com.tencent.bk.devops.ci.common)https://github.com/Tencent/bk-ci1.2.0-rc.7-RELEASE 等(共 3 个)
    # l! \. L4 W) i7 rreactor-netty(io.projectreactor.netty)https://github.com/reactor/reactor-netty1.0.9 等(共 75 个)
    $ `4 s; Q+ D: V8 Q' T: c8 jevcache-client-sample(com.netflix.evcache)https://github.com/Netflix/EVCache5.18.9 等(共 63 个)
    : x, [& X. d; X# c0 \xtdb-test(com.xtdb)https://github.com/xtdb/xtdb1.20.0 等(共 9 个)! B0 o4 F6 p/ @' k: g
    transport-netty4(com.strapdata.elasticsearch.plugin)https://github.com/strapdata/elassandra6.2.3.31 等(共 14 个)
      G: D) q* g7 y. ~sbt-metals(org.scalameta)https://github.com/scalameta/metals0.9.9 等(共 17 个)2 x$ r/ g6 r4 A; D5 L
    elastic4s-embedded_2.12(com.sksamuel.elastic4s)https://github.com/sksamuel/elastic4s6.7.8 等(共 100 个)0 C/ ^' w# @- C: o, }# a
    genie-agent(com.netflix.genie)https://github.com/Netflix/genie4.0.4 等(共 100 个)
    4 l% K+ c- ?* z* Ispring-kafka(org.springframework.kafka)https://github.com/spring-projects/spring-kafka2.7.9 等(共 79 个)! q. Z  d2 Z5 M- r) Q9 X- C1 }
    db-async-common_2.13(com.dripower)https://github.com/mauricio/postgresql-async0.3.109 等(共 19 个)
    ' s8 D" \$ x: c8 _selenide(com.codeborne)https://github.com/selenide/selenide5.25.0-selenium-4.0.0-rc-2 等(共 18 个)9 j, [# w- _! E+ ^( c, X: s9 W) l
    cloudfoundry-identity-server(org.cloudfoundry.identity)https://github.com/cloudfoundry/uaa4.30.0 等(共 1 个)) z& G+ b: k4 b2 z5 E3 B/ h) }
    servo-atlas(com.netflix.servo)https://github.com/Netflix/servo0.13.2 等(共 20 个)
    " h8 e! x$ d& _( \$ mrxnetty-spectator-tcp(io.reactivex)https://github.com/ReactiveX/RxNetty0.5.3-rc.4 等(共 12 个)
    & I( _6 K0 L  F) Z; Mmleap-tensorflow_2.10(ml.combust.mleap)https://github.com/combust/mleap0.9.6 等(共 25 个)' ]* p' T3 j7 u% B. o
    spark-testing-base_2.12(com.holdenkarau)https://github.com/holdenk/spark-testing-base2.4.4_1.1.1 等(共 100 个). X, L6 n7 u  X" Y  T. Q2 k
    graphql-kotlin-spring-client(com.expediagroup)https://github.com/ExpediaGroup/graphql-kotlin5.0.0-alpha.0 等(共 20 个)% d# q5 I" y" w7 L0 Q$ W& E
    graphql-spring-boot-test-autoconfigure(com.graphql-java-kickstart)https://github.com/graphql-java-kickstart/graphql-spring-boot8.1.1 等(共 33 个)
    9 W2 W% H* _) \  d7 I9 @- a! ~discord4j-rest(com.discord4j)https://github.com/Discord4J/Discord4J3.2.1 等(共 15 个)9 R; {6 S2 C- n) s, G
    twitter-server-logback-classic_2.13(com.twitter)https://github.com/twitter/twitter-server21.9.0 等(共 54 个)/ c+ l- p& j3 ]% H
    synthea(org.mitre.synthea)https://github.com/synthetichealth/synthea2.7.0 等(共 2 个)
    ' L! R" C0 }- R, V4 hspring-integration-redis(org.springframework.integration)https://github.com/spring-projects/spring-integration5.5.6 等(共 30 个)
    2 S+ ]; Z3 x2 @. J. gcyclops-reactor-integration(com.oath.cyclops)https://github.com/aol/cyclops10.4.0 等(共 1 个)
    8 o% O8 J8 ^8 ~$ O, ^& w. uakka-stream-alpakka-geode_2.12(com.lightbend.akka)https://github.com/akka/alpakka1.0-M1 等(共 13 个)
    + X& U$ b- [9 Smantis-client(io.mantisrx)https://github.com/Netflix/mantis1.3.9 等(共 83 个)$ h# Y5 C3 i- ?, ]8 n; }$ r- Q
    mybatis-generator-plugin(com.itfsw)https://github.com/itfsw/mybatis-generator-plugin1.2.9 等(共 31 个)
    ( j  ]5 G, a4 O1 H2 aktorm-support-sqlserver(org.ktorm)https://github.com/kotlin-orm/ktorm3.3.0 等(共 11 个)$ Y2 A  X$ o4 t- Y
    gatk(org.broadinstitute)https://github.com/broadinstitute/gatk4.beta.2 等(共 39 个)$ a7 m: Q' X# ]1 a5 ?( @
    azure-messaging-servicebus(com.azure)https://github.com/Azure/azure-sdk-for-java7.5.1 等(共 100 个)
    & q" _2 S( B$ j+ \# |! l: Bmica-metrics(net.dreamlu)https://github.com/lets-mica/mica2.5.7 等(共 7 个)
    , W6 d: B2 U+ x( W' ^) V2 nshiro-redis(org.crazycake)https://github.com/alexxiyang/shiro-redis3.3.1 等(共 2 个): e' e, I; e0 ^3 o/ s$ O
    enumeratum-play_2.12(com.beachape)https://github.com/lloydmeta/enumeratum1.5.16 等(共 2 个)/ Z' l0 S# x; J; ~6 j6 A1 \
    jdonframework(org.jdon)https://github.com/banq/jdonframework6.6.8 等(共 1 个), D! T5 {, [2 r  N
    weid-java-sdk(com.webank)https://github.com/WeBankBlockchain/WeIdentity1.8.1 等(共 3 个)
    . H. `3 l) v5 J3 O3 C8 hlog-protocol(io.shulie.pradar)https://github.com/shulieTech/Takin2.0.3 等(共 3 个)( {2 U, U- e" p$ u
    micro-boot(com.oath.microservices)https://github.com/aol/micro-server1.2.6 等(共 38 个)9 T* v, @- K; @( |
    sparkling-water-package_2.11(ai.h2o)https://github.com/h2oai/sparkling-water2.4.10 等(共 36 个)6 ^4 |& X$ S" b& l# \1 @
    scalatest_2.13(au.com.dius.pact.provider)https://github.com/pact-foundation/pact-jvm4.2.4 等(共 5 个)
    9 ?1 {2 B4 {- o- D* g% H9 f/ C& jmssql-jdbc(com.microsoft.sqlserver)https://github.com/microsoft/mssql-jdbc8.3.0.jre11-preview 等(共 100 个)9 u& [- `' Y6 c$ G7 O- f
    elide-spring-boot-starter(com.yahoo.elide)https://github.com/yahoo/elide6.0.3 等(共 45 个): R9 r# L/ h/ \( @2 j; \
    kafka-connect-elastic5(com.datamountaineer)https://github.com/lensesio/stream-reactor1.2.0 等(共 5 个)' {8 k5 W  p  W) G: G+ l
    kvision-server-spring-boot-jvm(io.kvision)https://github.com/rjaros/kvision5.4.3 等(共 9 个)6 f# p  u" O4 p5 w
    r2dbc-postgresql(org.postgresql)https://github.com/pgjdbc/r2dbc-postgresql0.9.0.RC1 等(共 8 个)
    7 i0 Y- H  u9 h. U3 W+ k+ ]play-slick-evolutions_2.13(com.typesafe.play)https://github.com/playframework/play-slick5.0.0-RC3 等(共 29 个)- a/ `: b  x4 \9 s+ e
    sbt-bloop-core(ch.epfl.scala)https://github.com/scalacenter/bloop1.4.8-43-c2d941d9 等(共 29 个)
    ) h. s$ H2 D& M# O0 q; x! jjcseg-elasticsearch(org.lionsoul)https://github.com/lionsoul2014/jcseg2.6.2 等(共 7 个)

    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.log4j2

    Linux:

    sudo find / -name "*log4j-*.jar"

    Windows:

    *log4j*.jar

    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

    Vulfocus 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:latest

    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-rc2

    3、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

    [1] https://github.com/apache/logging-log4j2/releases/tag/log4j-2.15.0-rc1

    [2] [LOG4J2-3201] Limit the protocols jNDI can use and restrict LDAP. - ASF JIRA (apache.org)

    [3] ASF Git Repos - logging-log4j2.git/blob - log4j-core/src/test/java/org/apache/logging/log4j/core/lookup/JndiRestrictedLookupTest.java

    [4] https://mp.weixin.qq.com/s/wC7mrK1Y4DYz9_yW4fLzbw

    [5] https://help.aliyun.com/noticelist/articleid/1060971232.html

    [6] https://mp.weixin.qq.com/s/C4zeXHKHDqPeRuLytO7Fzw


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