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Apache Log4j2 远程代码执行漏洞

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  • TA的每日心情
    奋斗
    昨天 13:37
  • 签到天数: 2387 天

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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
      # A9 ~) D7 r( D: u  l
    受影响开源组件
    项目
    仓库地址
    版本
    5 e5 D' V% F+ K9 d
    elasticsearch(org.elasticsearch)https://github.com/elastic/elasticsearch8.0.0-alpha2 等(共 100 个)
    ! t# j! y# E! x+ t+ |2 k' Ispring-webflux(org.springframework)https://github.com/spring-projects/spring-framework5.2.6.RELEASE 等(共 40 个)% u  m5 S- U% i8 S$ h
    druid(com.alibaba)https://github.com/alibaba/druid1.2.8 等(共 68 个)
    + y$ ?" q* u: Ohystrix-rx-netty-metrics-stream(com.netflix.hystrix)https://github.com/Netflix/Hystrix1.5.4 等(共 2 个)
    & r1 B* G+ O# V1 f, \spring-cloud-starter-alibaba-sentinel(com.alibaba.cloud)https://github.com/alibaba/spring-cloud-alibaba2021.1 等(共 14 个)4 `/ b# a+ M( S1 {( c3 F; ?6 b  [2 a
    spring-boot-starter-ahas-sentinel-client(com.alibaba.csp)https://github.com/alibaba/Sentinel1.3.2 等(共 17 个)
    ! g2 [* J7 ?9 D0 g2 U% `redisson(org.redisson)https://github.com/redisson/redisson2.2.24 等(共 3 个)1 `& |5 I4 r! \* ?+ m
    HikariCP(com.zaxxer)https://github.com/brettwooldridge/HikariCP5.0.0 等(共 27 个)
    1 A9 v: J7 h( b( Kzipkin-collector-service(io.zipkin)https://github.com/openzipkin/zipkin1.40.2 等(共 27 个)
    # s' n1 j/ ^; ^6 G: d2 \mybatis-plus(com.baomidou)https://github.com/baomidou/mybatis-plus3.4.3.4 等(共 41 个): W1 X/ l- Z5 H; Y2 a- @& j
    zuul-sample(com.netflix.zuul)https://github.com/Netflix/zuul2.3.0 等(共 10 个)6 `$ L; Z7 s: _
    watson-data-api-client(com.ibm.watson.data)https://github.com/OpenAPITools/openapi-generator0.1 等(共 1 个)
    ! ]2 V6 q8 X$ {/ L6 gspring-boot-admin-sample-consul(de.codecentric)https://github.com/codecentric/spring-boot-admin2.5.4 等(共 40 个)3 I1 [# @2 g+ a; C7 k4 T$ r+ n7 t% @
    jedis(redis.clients)https://github.com/redis/jedisjedis-3.6.2 等(共 36 个)
      e& \4 z3 b1 \. e' ugrpc-benchmarks(io.grpc)https://github.com/grpc/grpc-java1.9.1 等(共 65 个)
    5 v* P6 \6 ^1 s3 y6 ?7 R) H" Nktor-client-json-tests(io.ktor)https://github.com/ktorio/ktor1.6.7 等(共 32 个)" a; W$ W! m4 \; e- s1 c
    gitbucket_2.13(io.github.gitbucket)https://github.com/gitbucket/gitbucket4.32.0 等(共 27 个)7 P9 E. E! C1 W2 H2 r0 f+ _8 w4 ?
    finagle-zipkin_2.12(com.twitter)https://github.com/twitter/finagle7.1.0 等(共 56 个)
    ( I! Q. |  A, A. uresilience4j-vertx(io.github.resilience4j)https://github.com/resilience4j/resilience4j0.9.0 等(共 9 个)& m/ f0 ]" s3 K) N- b
    elasticsearch-sql(org.nlpcn)https://github.com/NLPchina/elasticsearch-sql6.8.13.0 等(共 9 个)
    $ y! a( F6 W, Y: xexposed-spring-boot-starter(org.jetbrains.exposed)https://github.com/JetBrains/Exposed0.36.2 等(共 11 个)
    ) w5 ?+ X' x5 {. L/ Sblade-sql2o(com.bladejava)https://github.com/lets-blade/blade1.2.9 等(共 1 个)" c0 s4 {$ a2 i& }
    netty-socketio(com.corundumstudio.socketio)https://github.com/mrniko/netty-socketio1.7.19 等(共 8 个)
    8 o" X* A. \9 Dspringfox-swagger2(io.springfox)https://github.com/springfox/springfox2.10.5 等(共 6 个)
    1 X! A$ K* }5 pmain_2.12(org.scala-sbt)https://github.com/sbt/sbt1.6.0-RC1 等(共 88 个)
    ; r8 Q- B7 m4 Q2 I7 X! j& llettuce-core(io.lettuce)https://github.com/lettuce-io/lettuce-core6.1.5.RELEASE 等(共 42 个)7 W- D# Q$ I2 s$ f4 `
    repository-azure(org.opensearch.plugin)https://github.com/opensearch-project/OpenSearch1.2.0 等(共 3 个)& {0 c( C0 ~1 }+ J. u$ l
    reactor-test(io.projectreactor)https://github.com/reactor/reactor-core3.3.4.RELEASE 等(共 3 个)
    ) e& j; C$ C4 y# W& \5 k9 j9 bcorda-webserver-impl(net.corda)https://github.com/corda/cordacorda-3.0 等(共 32 个)
    , Z- K. N; s& f: j' sconductor-redis-persistence(com.netflix.conductor)https://github.com/Netflix/conductor3.3.6 等(共 100 个)
    " Q# H* }, @* @7 M$ Marmeria(com.linecorp.armeria)https://github.com/line/armeria0.26.1.Final 等(共 2 个)5 a) n" c4 n' J" \1 M
    breeze-parent_2.13(org.scalanlp)https://github.com/scalanlp/breeze2.0.1-RC1 等(共 5 个)7 k* K. B! a; d, t1 G1 N4 X. _0 g
    micrometer-core(io.micrometer)https://github.com/micrometer-metrics/micrometer1.8.1 等(共 98 个)
    . _4 u6 d. i3 A7 [8 malink_connector_jdbc_sqlite_flink-1.9_2.11(com.alibaba.alink)https://github.com/alibaba/Alink1.5.1 等(共 3 个)2 e" c$ c' c3 V5 o5 S. A
    initializr-actuator(io.spring.initializr)https://github.com/spring-io/initializr0.9.0 等(共 6 个)
    . m8 d. b$ K1 Stelegrambots-spring-boot-starter(org.telegram)https://github.com/rubenlagus/TelegramBots4.9.1 等(共 17 个)  }0 F/ s' k9 D$ I- w! R
    spring-data-elasticsearch(org.springframework.data)https://github.com/spring-projects/spring-data-elasticsearch4.3.0 等(共 86 个)6 B5 E: G, I0 m
    feast-common(dev.feast)https://github.com/feast-dev/feast0.9.2 等(共 26 个)3 `. P: c, L0 h3 f* |! W# T  Y
    javamelody-core(net.bull.javamelody)https://github.com/javamelody/javamelody1.88.0 等(共 13 个)
    7 e5 s& d' M! g# x7 P/ k4 [. l1 K1 Kanalytics-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)) U/ m& _# J5 \" v/ u  C
    scio-tensorflow_2.13(com.spotify)https://github.com/spotify/scio0.9.6 等(共 97 个)( n' e% M: A6 K
    grpc-client-spring-boot-autoconfigure(net.devh)https://github.com/yidongnan/grpc-spring-boot-starter2.9.0.RELEASE 等(共 16 个)
    & y; \  ~( J% m& g! Hinject-server_2.12(com.twitter)https://github.com/twitter/finatra21.9.0 等(共 56 个)$ _/ `, ]9 [1 i; M6 [( b
    client-java-examples(io.kubernetes)https://github.com/kubernetes-client/java8.0.2 等(共 1 个)! x7 ^+ F6 x8 g9 \3 O6 s1 [& g
    reactivesocket-tck-drivers(io.reactivesocket)https://github.com/rsocket/rsocket-java0.6.0 等(共 1 个)
    . p+ X, T/ y2 K' Vjest-droid(io.searchbox)https://github.com/searchbox-io/Jest6.3.1 等(共 8 个)  q* A% \, ~$ x8 g6 o6 D
    graphql-dgs-example-java-webflux(com.netflix.graphql.dgs)https://github.com/Netflix/dgs-framework4.9.7 等(共 36 个)
    ( }$ h. h$ ?+ j# R; tquill-jdbc-monix_2.11(io.getquill)https://github.com/getquill/quill3.9.0 等(共 62 个)2 d; ^! P4 {: T! i
    doobie-quill_2.12(org.tpolecat)https://github.com/tpolecat/doobie1.0.0-RC1 等(共 61 个)
    # ?. O8 n8 A! B, dhttp4k(org.http4k)https://github.com/http4k/http4k4.3.4.1 等(共 3 个)
    - L0 e7 f2 f$ kelasticsearch-hadoop(org.elasticsearch)https://github.com/elastic/elasticsearch-hadoop8.0.0-beta1 等(共 100 个)0 \, C$ m$ N/ F3 \/ o6 H' ]1 j' }
    sbt-shading(io.get-coursier)https://github.com/coursier/coursier1.0.0-RC8 等(共 1 个)
    . \- F( A1 Y: [spark-cassandra-connector-unshaded_2.10(com.datastax.spark)https://github.com/datastax/spark-cassandra-connector2.0.9 等(共 54 个)
    ( K: D- I% `0 U- h, i! F2 Owebdrivermanager(io.github.bonigarcia)https://github.com/bonigarcia/webdrivermanager4.0.0 等(共 15 个)
    6 b7 A8 H! L1 ~% d& scommon-auth-v3(com.tencent.bk.devops.ci.common)https://github.com/Tencent/bk-ci1.2.0-rc.7-RELEASE 等(共 3 个)# n/ w. U* e" K& V5 k: O: c
    reactor-netty(io.projectreactor.netty)https://github.com/reactor/reactor-netty1.0.9 等(共 75 个)" m/ A2 G! [( N6 J1 T
    evcache-client-sample(com.netflix.evcache)https://github.com/Netflix/EVCache5.18.9 等(共 63 个)# f1 `' x6 x) ]' z# O# N& G2 b1 R
    xtdb-test(com.xtdb)https://github.com/xtdb/xtdb1.20.0 等(共 9 个)+ n! _) `' I5 ~9 }$ ^
    transport-netty4(com.strapdata.elasticsearch.plugin)https://github.com/strapdata/elassandra6.2.3.31 等(共 14 个), |4 H  C- i9 F! b; [8 D! F6 g; J. i
    sbt-metals(org.scalameta)https://github.com/scalameta/metals0.9.9 等(共 17 个)3 H) g/ L; Q) v" Q
    elastic4s-embedded_2.12(com.sksamuel.elastic4s)https://github.com/sksamuel/elastic4s6.7.8 等(共 100 个), O6 W9 [  |& S
    genie-agent(com.netflix.genie)https://github.com/Netflix/genie4.0.4 等(共 100 个)
    4 ~7 @0 g1 R! h4 }; X8 q* t0 Q& Nspring-kafka(org.springframework.kafka)https://github.com/spring-projects/spring-kafka2.7.9 等(共 79 个)
    & _  X  X# {9 G( ndb-async-common_2.13(com.dripower)https://github.com/mauricio/postgresql-async0.3.109 等(共 19 个)
    ( N. P& n% K7 i/ Z+ Tselenide(com.codeborne)https://github.com/selenide/selenide5.25.0-selenium-4.0.0-rc-2 等(共 18 个)
    1 ]2 A5 p: _0 X2 Fcloudfoundry-identity-server(org.cloudfoundry.identity)https://github.com/cloudfoundry/uaa4.30.0 等(共 1 个)
    & L' u: _; i% X7 X1 fservo-atlas(com.netflix.servo)https://github.com/Netflix/servo0.13.2 等(共 20 个)1 z% p+ r: |2 q
    rxnetty-spectator-tcp(io.reactivex)https://github.com/ReactiveX/RxNetty0.5.3-rc.4 等(共 12 个)+ x- E5 K9 M, O
    mleap-tensorflow_2.10(ml.combust.mleap)https://github.com/combust/mleap0.9.6 等(共 25 个)
    0 v! B3 F+ h6 mspark-testing-base_2.12(com.holdenkarau)https://github.com/holdenk/spark-testing-base2.4.4_1.1.1 等(共 100 个)
    7 ?7 T6 G; \" l5 bgraphql-kotlin-spring-client(com.expediagroup)https://github.com/ExpediaGroup/graphql-kotlin5.0.0-alpha.0 等(共 20 个)5 U0 d+ p2 }! X. @5 Y
    graphql-spring-boot-test-autoconfigure(com.graphql-java-kickstart)https://github.com/graphql-java-kickstart/graphql-spring-boot8.1.1 等(共 33 个)8 p7 l' B; e7 M  G! Z
    discord4j-rest(com.discord4j)https://github.com/Discord4J/Discord4J3.2.1 等(共 15 个)
    ) B( p* N9 j% n: ptwitter-server-logback-classic_2.13(com.twitter)https://github.com/twitter/twitter-server21.9.0 等(共 54 个), |5 G% \9 d4 z3 B
    synthea(org.mitre.synthea)https://github.com/synthetichealth/synthea2.7.0 等(共 2 个)6 _- X% {8 z) j  @
    spring-integration-redis(org.springframework.integration)https://github.com/spring-projects/spring-integration5.5.6 等(共 30 个)- y8 f; H! _- c& f0 Q
    cyclops-reactor-integration(com.oath.cyclops)https://github.com/aol/cyclops10.4.0 等(共 1 个)1 R! C; I: m4 S8 P1 s; Y
    akka-stream-alpakka-geode_2.12(com.lightbend.akka)https://github.com/akka/alpakka1.0-M1 等(共 13 个); m( O3 h# k7 _6 D
    mantis-client(io.mantisrx)https://github.com/Netflix/mantis1.3.9 等(共 83 个)% f; C; N1 p$ R$ W) V3 h% L
    mybatis-generator-plugin(com.itfsw)https://github.com/itfsw/mybatis-generator-plugin1.2.9 等(共 31 个)4 a7 p+ ]0 G5 _: e
    ktorm-support-sqlserver(org.ktorm)https://github.com/kotlin-orm/ktorm3.3.0 等(共 11 个)" n# F* ]+ q& q9 u8 W
    gatk(org.broadinstitute)https://github.com/broadinstitute/gatk4.beta.2 等(共 39 个)
    : _, l* g) w4 a) M$ W1 ^azure-messaging-servicebus(com.azure)https://github.com/Azure/azure-sdk-for-java7.5.1 等(共 100 个)4 p* N: T0 ]3 J1 o& T: r
    mica-metrics(net.dreamlu)https://github.com/lets-mica/mica2.5.7 等(共 7 个)% {8 s4 i* W" f9 T" o  M8 I' B: \1 Y. n* v
    shiro-redis(org.crazycake)https://github.com/alexxiyang/shiro-redis3.3.1 等(共 2 个)
    9 j2 p( @* j1 [! Z# V4 @# \5 G* d9 Penumeratum-play_2.12(com.beachape)https://github.com/lloydmeta/enumeratum1.5.16 等(共 2 个)1 b: r6 C# S& i* S' X, ]
    jdonframework(org.jdon)https://github.com/banq/jdonframework6.6.8 等(共 1 个)
    6 e) N, d' v: J2 A$ `" [/ X' hweid-java-sdk(com.webank)https://github.com/WeBankBlockchain/WeIdentity1.8.1 等(共 3 个)8 n/ r. Z2 ]* g/ G' K
    log-protocol(io.shulie.pradar)https://github.com/shulieTech/Takin2.0.3 等(共 3 个)
    4 U. |+ V( h7 c/ t# Wmicro-boot(com.oath.microservices)https://github.com/aol/micro-server1.2.6 等(共 38 个); _+ Y# [& B3 S  e; u1 R
    sparkling-water-package_2.11(ai.h2o)https://github.com/h2oai/sparkling-water2.4.10 等(共 36 个)
    , F( N. C1 R- ^' h9 e+ L! ascalatest_2.13(au.com.dius.pact.provider)https://github.com/pact-foundation/pact-jvm4.2.4 等(共 5 个)" Z' c/ d8 \+ o# m7 @! Q, Z
    mssql-jdbc(com.microsoft.sqlserver)https://github.com/microsoft/mssql-jdbc8.3.0.jre11-preview 等(共 100 个)# o1 d$ a% F9 F$ V- V8 z/ X: K
    elide-spring-boot-starter(com.yahoo.elide)https://github.com/yahoo/elide6.0.3 等(共 45 个)! u- D) Q: a) G; N1 C% w- y
    kafka-connect-elastic5(com.datamountaineer)https://github.com/lensesio/stream-reactor1.2.0 等(共 5 个)% g3 j6 W1 P/ C' [& b, y: L
    kvision-server-spring-boot-jvm(io.kvision)https://github.com/rjaros/kvision5.4.3 等(共 9 个)
    ( Z5 a9 k7 d* i+ a$ o+ L) y+ Nr2dbc-postgresql(org.postgresql)https://github.com/pgjdbc/r2dbc-postgresql0.9.0.RC1 等(共 8 个)
    7 ^' J, ?9 t& U$ ~6 S: l( e  Wplay-slick-evolutions_2.13(com.typesafe.play)https://github.com/playframework/play-slick5.0.0-RC3 等(共 29 个)
    . f: B# k! m9 F$ w' c2 ~1 Z+ isbt-bloop-core(ch.epfl.scala)https://github.com/scalacenter/bloop1.4.8-43-c2d941d9 等(共 29 个)2 z- `3 X2 Y9 x) ^
    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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