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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; `  A* J$ i$ T5 O! n. R$ h: L
    受影响开源组件
    项目
    仓库地址
    版本
      ?" S7 I1 {( p8 g4 h7 z2 A: z7 z& b
    elasticsearch(org.elasticsearch)https://github.com/elastic/elasticsearch8.0.0-alpha2 等(共 100 个)
    3 T1 y& @- w, R8 M2 i" N# K; Ispring-webflux(org.springframework)https://github.com/spring-projects/spring-framework5.2.6.RELEASE 等(共 40 个)9 S! ?; v: E4 h; Q: U+ j
    druid(com.alibaba)https://github.com/alibaba/druid1.2.8 等(共 68 个)8 p' n  Q% G# X+ P3 Q! `" W
    hystrix-rx-netty-metrics-stream(com.netflix.hystrix)https://github.com/Netflix/Hystrix1.5.4 等(共 2 个)
    " h: g1 A+ E# \3 l# D% _2 p1 kspring-cloud-starter-alibaba-sentinel(com.alibaba.cloud)https://github.com/alibaba/spring-cloud-alibaba2021.1 等(共 14 个)
    6 u1 Z7 m0 T, {) d8 B. Yspring-boot-starter-ahas-sentinel-client(com.alibaba.csp)https://github.com/alibaba/Sentinel1.3.2 等(共 17 个)
    ' V2 m$ ]1 Q7 Y2 }& O0 N& Xredisson(org.redisson)https://github.com/redisson/redisson2.2.24 等(共 3 个)8 Y7 A5 K( v/ S% T: ]: e
    HikariCP(com.zaxxer)https://github.com/brettwooldridge/HikariCP5.0.0 等(共 27 个)  m% |6 y% o) d9 v' R7 t; O
    zipkin-collector-service(io.zipkin)https://github.com/openzipkin/zipkin1.40.2 等(共 27 个)6 q& D1 ]$ k9 D
    mybatis-plus(com.baomidou)https://github.com/baomidou/mybatis-plus3.4.3.4 等(共 41 个)4 O* ~; [! v, e0 p
    zuul-sample(com.netflix.zuul)https://github.com/Netflix/zuul2.3.0 等(共 10 个)
    9 X+ o" E8 d) W7 dwatson-data-api-client(com.ibm.watson.data)https://github.com/OpenAPITools/openapi-generator0.1 等(共 1 个)/ \$ w5 D; {: g( W2 M/ [
    spring-boot-admin-sample-consul(de.codecentric)https://github.com/codecentric/spring-boot-admin2.5.4 等(共 40 个)2 F) a. |5 {7 c( R  ]9 k5 e
    jedis(redis.clients)https://github.com/redis/jedisjedis-3.6.2 等(共 36 个)
      _) A. Q* f4 T* d2 ~! egrpc-benchmarks(io.grpc)https://github.com/grpc/grpc-java1.9.1 等(共 65 个)7 e: k9 ^9 i/ O9 H3 k& F' j6 `
    ktor-client-json-tests(io.ktor)https://github.com/ktorio/ktor1.6.7 等(共 32 个)
    % P* \+ X: d  l; Tgitbucket_2.13(io.github.gitbucket)https://github.com/gitbucket/gitbucket4.32.0 等(共 27 个), K+ S. v0 t( |: |/ x% n! \
    finagle-zipkin_2.12(com.twitter)https://github.com/twitter/finagle7.1.0 等(共 56 个)+ I, n# j* S. f5 w
    resilience4j-vertx(io.github.resilience4j)https://github.com/resilience4j/resilience4j0.9.0 等(共 9 个)# D' n" [3 e# e. D
    elasticsearch-sql(org.nlpcn)https://github.com/NLPchina/elasticsearch-sql6.8.13.0 等(共 9 个): Q1 G, b2 J# O% C
    exposed-spring-boot-starter(org.jetbrains.exposed)https://github.com/JetBrains/Exposed0.36.2 等(共 11 个)
    " r5 M. n+ k& U: [8 a+ Xblade-sql2o(com.bladejava)https://github.com/lets-blade/blade1.2.9 等(共 1 个)
    6 z. t3 [2 F! `) E1 [# n0 f9 I6 Inetty-socketio(com.corundumstudio.socketio)https://github.com/mrniko/netty-socketio1.7.19 等(共 8 个): P. v* `' u& Y4 c! s' W8 s
    springfox-swagger2(io.springfox)https://github.com/springfox/springfox2.10.5 等(共 6 个), d, N0 g/ U" G& _9 _
    main_2.12(org.scala-sbt)https://github.com/sbt/sbt1.6.0-RC1 等(共 88 个)& h, R/ z: u6 T, ^
    lettuce-core(io.lettuce)https://github.com/lettuce-io/lettuce-core6.1.5.RELEASE 等(共 42 个)
    3 i! g% u* O+ drepository-azure(org.opensearch.plugin)https://github.com/opensearch-project/OpenSearch1.2.0 等(共 3 个)# t' E+ \8 \# l' r7 h% i3 n0 S
    reactor-test(io.projectreactor)https://github.com/reactor/reactor-core3.3.4.RELEASE 等(共 3 个); s) _" b$ s5 {, R8 ^
    corda-webserver-impl(net.corda)https://github.com/corda/cordacorda-3.0 等(共 32 个); E5 G, ]" X2 q' t& N' U
    conductor-redis-persistence(com.netflix.conductor)https://github.com/Netflix/conductor3.3.6 等(共 100 个)" q1 N( j" }8 T7 h. ]% y: T. s0 |
    armeria(com.linecorp.armeria)https://github.com/line/armeria0.26.1.Final 等(共 2 个)
    * D* E1 @& q3 O, K: O" Obreeze-parent_2.13(org.scalanlp)https://github.com/scalanlp/breeze2.0.1-RC1 等(共 5 个)
    4 U2 @2 O% B  c' e7 J# _6 kmicrometer-core(io.micrometer)https://github.com/micrometer-metrics/micrometer1.8.1 等(共 98 个)
    . w3 x0 Q3 q; jalink_connector_jdbc_sqlite_flink-1.9_2.11(com.alibaba.alink)https://github.com/alibaba/Alink1.5.1 等(共 3 个)4 N8 u' S7 k" V
    initializr-actuator(io.spring.initializr)https://github.com/spring-io/initializr0.9.0 等(共 6 个)
    - `3 y0 i6 y8 ~  i: B- rtelegrambots-spring-boot-starter(org.telegram)https://github.com/rubenlagus/TelegramBots4.9.1 等(共 17 个)* `5 F2 F/ {3 Z/ k  s9 W
    spring-data-elasticsearch(org.springframework.data)https://github.com/spring-projects/spring-data-elasticsearch4.3.0 等(共 86 个)
    ! K+ t$ i8 E4 a1 y7 Jfeast-common(dev.feast)https://github.com/feast-dev/feast0.9.2 等(共 26 个)
    ! g4 I) Z  W7 @- x- v2 o/ Y+ J1 jjavamelody-core(net.bull.javamelody)https://github.com/javamelody/javamelody1.88.0 等(共 13 个)
    3 t/ }7 D3 B2 a4 `+ Ianalytics-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)
    + D; S2 m& b7 r- dscio-tensorflow_2.13(com.spotify)https://github.com/spotify/scio0.9.6 等(共 97 个)4 ]/ B& K* o" n- H; Q* \
    grpc-client-spring-boot-autoconfigure(net.devh)https://github.com/yidongnan/grpc-spring-boot-starter2.9.0.RELEASE 等(共 16 个)
    % R0 h1 d% N) H" o" V4 f1 _1 @inject-server_2.12(com.twitter)https://github.com/twitter/finatra21.9.0 等(共 56 个)
    6 ^  P/ z: Y9 d" j7 p6 a8 R6 R' fclient-java-examples(io.kubernetes)https://github.com/kubernetes-client/java8.0.2 等(共 1 个)8 g4 @/ I+ c7 k: {8 B4 V
    reactivesocket-tck-drivers(io.reactivesocket)https://github.com/rsocket/rsocket-java0.6.0 等(共 1 个)
    & |5 p  S+ A% y$ x; y: xjest-droid(io.searchbox)https://github.com/searchbox-io/Jest6.3.1 等(共 8 个)
    9 F1 W& b" C6 X9 a! b5 ^8 tgraphql-dgs-example-java-webflux(com.netflix.graphql.dgs)https://github.com/Netflix/dgs-framework4.9.7 等(共 36 个)# d7 s4 G# b" H
    quill-jdbc-monix_2.11(io.getquill)https://github.com/getquill/quill3.9.0 等(共 62 个)
    6 C, F7 c' h: odoobie-quill_2.12(org.tpolecat)https://github.com/tpolecat/doobie1.0.0-RC1 等(共 61 个)
    ( r7 h2 z1 E) q* h8 |7 [http4k(org.http4k)https://github.com/http4k/http4k4.3.4.1 等(共 3 个)& w7 V+ ?- z; {& V) G
    elasticsearch-hadoop(org.elasticsearch)https://github.com/elastic/elasticsearch-hadoop8.0.0-beta1 等(共 100 个)
    9 L( B7 L9 R0 [2 G* Rsbt-shading(io.get-coursier)https://github.com/coursier/coursier1.0.0-RC8 等(共 1 个)0 Q  E# @/ V7 ^+ W
    spark-cassandra-connector-unshaded_2.10(com.datastax.spark)https://github.com/datastax/spark-cassandra-connector2.0.9 等(共 54 个), M# y* G) y' M/ j9 [4 \
    webdrivermanager(io.github.bonigarcia)https://github.com/bonigarcia/webdrivermanager4.0.0 等(共 15 个)
    * B" o. }1 V) K. P1 c1 |common-auth-v3(com.tencent.bk.devops.ci.common)https://github.com/Tencent/bk-ci1.2.0-rc.7-RELEASE 等(共 3 个)$ q7 Q' `& l4 }  j
    reactor-netty(io.projectreactor.netty)https://github.com/reactor/reactor-netty1.0.9 等(共 75 个)
    : I  U6 n+ U# n2 {3 K7 bevcache-client-sample(com.netflix.evcache)https://github.com/Netflix/EVCache5.18.9 等(共 63 个)
    6 w) `% y5 b9 w* k9 `) xxtdb-test(com.xtdb)https://github.com/xtdb/xtdb1.20.0 等(共 9 个)  @- s/ R- a3 k$ ?7 Y
    transport-netty4(com.strapdata.elasticsearch.plugin)https://github.com/strapdata/elassandra6.2.3.31 等(共 14 个)1 b; s  `) C, M, d
    sbt-metals(org.scalameta)https://github.com/scalameta/metals0.9.9 等(共 17 个)
    $ v/ I& k7 }+ T0 c& T- F/ Lelastic4s-embedded_2.12(com.sksamuel.elastic4s)https://github.com/sksamuel/elastic4s6.7.8 等(共 100 个)
    ( ]% t  }. q! ]genie-agent(com.netflix.genie)https://github.com/Netflix/genie4.0.4 等(共 100 个)
    $ @: L$ A. u: D! k9 tspring-kafka(org.springframework.kafka)https://github.com/spring-projects/spring-kafka2.7.9 等(共 79 个)
    5 z! i8 m# w, a7 J0 @2 _+ T: j6 ]db-async-common_2.13(com.dripower)https://github.com/mauricio/postgresql-async0.3.109 等(共 19 个); u: {, H) Z" W
    selenide(com.codeborne)https://github.com/selenide/selenide5.25.0-selenium-4.0.0-rc-2 等(共 18 个)
    ; x5 E* a; m6 }cloudfoundry-identity-server(org.cloudfoundry.identity)https://github.com/cloudfoundry/uaa4.30.0 等(共 1 个)
    7 |: `, J+ |6 q% b2 G, w$ sservo-atlas(com.netflix.servo)https://github.com/Netflix/servo0.13.2 等(共 20 个)8 d; E' b4 M% u6 b9 z" f$ Z
    rxnetty-spectator-tcp(io.reactivex)https://github.com/ReactiveX/RxNetty0.5.3-rc.4 等(共 12 个)7 [' _: F2 |- B
    mleap-tensorflow_2.10(ml.combust.mleap)https://github.com/combust/mleap0.9.6 等(共 25 个)
    / P& ]) s, ~$ K# u) t. s9 D- Nspark-testing-base_2.12(com.holdenkarau)https://github.com/holdenk/spark-testing-base2.4.4_1.1.1 等(共 100 个)
    4 V+ _; u0 l2 v6 B9 s3 |; ^' o5 k& igraphql-kotlin-spring-client(com.expediagroup)https://github.com/ExpediaGroup/graphql-kotlin5.0.0-alpha.0 等(共 20 个)4 [6 t, W: q& e  h. u
    graphql-spring-boot-test-autoconfigure(com.graphql-java-kickstart)https://github.com/graphql-java-kickstart/graphql-spring-boot8.1.1 等(共 33 个)6 ]; `  u9 Z* a' A0 a' X* ^
    discord4j-rest(com.discord4j)https://github.com/Discord4J/Discord4J3.2.1 等(共 15 个)
    / P3 j8 F& t% R& j2 Q  _twitter-server-logback-classic_2.13(com.twitter)https://github.com/twitter/twitter-server21.9.0 等(共 54 个)
    + Z' \- j/ {) V+ G8 \synthea(org.mitre.synthea)https://github.com/synthetichealth/synthea2.7.0 等(共 2 个)8 ?! ^6 ^* q( o9 I& S
    spring-integration-redis(org.springframework.integration)https://github.com/spring-projects/spring-integration5.5.6 等(共 30 个)+ d  O* {* n. y# \
    cyclops-reactor-integration(com.oath.cyclops)https://github.com/aol/cyclops10.4.0 等(共 1 个)
    , l' h. ^4 y- {( {0 uakka-stream-alpakka-geode_2.12(com.lightbend.akka)https://github.com/akka/alpakka1.0-M1 等(共 13 个)
    9 B) n$ W% U/ C) Z! N* Q/ f7 ^mantis-client(io.mantisrx)https://github.com/Netflix/mantis1.3.9 等(共 83 个)8 N6 ]# X4 l! {4 ]. V
    mybatis-generator-plugin(com.itfsw)https://github.com/itfsw/mybatis-generator-plugin1.2.9 等(共 31 个)- k9 z2 S! t% l; Q
    ktorm-support-sqlserver(org.ktorm)https://github.com/kotlin-orm/ktorm3.3.0 等(共 11 个)
    ; \0 R8 m: S' f7 |) J# Z6 zgatk(org.broadinstitute)https://github.com/broadinstitute/gatk4.beta.2 等(共 39 个)
    1 _- Q  u0 K$ l+ G5 _4 f- Tazure-messaging-servicebus(com.azure)https://github.com/Azure/azure-sdk-for-java7.5.1 等(共 100 个)
    ( }' l9 Q/ a4 a) f2 d" J( Zmica-metrics(net.dreamlu)https://github.com/lets-mica/mica2.5.7 等(共 7 个)
    0 U& a% P3 j* l* `7 _  O2 K0 {shiro-redis(org.crazycake)https://github.com/alexxiyang/shiro-redis3.3.1 等(共 2 个): m0 M; M1 f  i$ b( ^
    enumeratum-play_2.12(com.beachape)https://github.com/lloydmeta/enumeratum1.5.16 等(共 2 个)8 F1 Y! v: d" e7 w: H5 t
    jdonframework(org.jdon)https://github.com/banq/jdonframework6.6.8 等(共 1 个)$ s  n/ m! s9 a) \9 `* i
    weid-java-sdk(com.webank)https://github.com/WeBankBlockchain/WeIdentity1.8.1 等(共 3 个)
    $ X8 Q5 M$ N0 Olog-protocol(io.shulie.pradar)https://github.com/shulieTech/Takin2.0.3 等(共 3 个)
    $ P( E2 w6 t  W! Z# m% w7 ^/ tmicro-boot(com.oath.microservices)https://github.com/aol/micro-server1.2.6 等(共 38 个)1 R4 _: l8 [$ k1 Q( a2 O- w
    sparkling-water-package_2.11(ai.h2o)https://github.com/h2oai/sparkling-water2.4.10 等(共 36 个)
    5 w1 S: X. C1 F! z. `- w: Yscalatest_2.13(au.com.dius.pact.provider)https://github.com/pact-foundation/pact-jvm4.2.4 等(共 5 个)
    : y6 @5 _; v& omssql-jdbc(com.microsoft.sqlserver)https://github.com/microsoft/mssql-jdbc8.3.0.jre11-preview 等(共 100 个)) B. n& o; f5 y& }3 e2 N
    elide-spring-boot-starter(com.yahoo.elide)https://github.com/yahoo/elide6.0.3 等(共 45 个)
    / s$ V. b; k( g9 Hkafka-connect-elastic5(com.datamountaineer)https://github.com/lensesio/stream-reactor1.2.0 等(共 5 个)
    0 K5 F6 r6 p; m& [# e0 F' E5 m9 j) zkvision-server-spring-boot-jvm(io.kvision)https://github.com/rjaros/kvision5.4.3 等(共 9 个)
    ! l, q$ w, l& K& G8 g. Jr2dbc-postgresql(org.postgresql)https://github.com/pgjdbc/r2dbc-postgresql0.9.0.RC1 等(共 8 个)+ g1 s" l- c" r( |
    play-slick-evolutions_2.13(com.typesafe.play)https://github.com/playframework/play-slick5.0.0-RC3 等(共 29 个); D0 i% x7 z* m
    sbt-bloop-core(ch.epfl.scala)https://github.com/scalacenter/bloop1.4.8-43-c2d941d9 等(共 29 个)+ o0 U$ ?# X- y2 N9 H5 M8 L
    jcseg-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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