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Apache Log4j2 远程代码执行漏洞

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    前天 10:21
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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
      $ \# ]7 O3 r! M: P. x
    受影响开源组件
    项目
    仓库地址
    版本

    ! X; M$ I; x" A7 q( k3 \elasticsearch(org.elasticsearch)https://github.com/elastic/elasticsearch8.0.0-alpha2 等(共 100 个)6 C3 E% Z5 j8 B, M, f
    spring-webflux(org.springframework)https://github.com/spring-projects/spring-framework5.2.6.RELEASE 等(共 40 个)
    7 q0 G4 S, x" e/ ?; wdruid(com.alibaba)https://github.com/alibaba/druid1.2.8 等(共 68 个)* A0 o$ b; O/ Q' R
    hystrix-rx-netty-metrics-stream(com.netflix.hystrix)https://github.com/Netflix/Hystrix1.5.4 等(共 2 个)
    2 V: K- K  n, n- L# Q% aspring-cloud-starter-alibaba-sentinel(com.alibaba.cloud)https://github.com/alibaba/spring-cloud-alibaba2021.1 等(共 14 个)
    3 e6 L( b+ C4 x, f+ j+ {spring-boot-starter-ahas-sentinel-client(com.alibaba.csp)https://github.com/alibaba/Sentinel1.3.2 等(共 17 个)
    / c7 `1 r" ]4 Jredisson(org.redisson)https://github.com/redisson/redisson2.2.24 等(共 3 个)
    + }& ~6 X7 m( u% I4 Y# SHikariCP(com.zaxxer)https://github.com/brettwooldridge/HikariCP5.0.0 等(共 27 个)8 E( t3 [1 I$ A% s! L
    zipkin-collector-service(io.zipkin)https://github.com/openzipkin/zipkin1.40.2 等(共 27 个)
    , ^( Q4 W/ O* v* amybatis-plus(com.baomidou)https://github.com/baomidou/mybatis-plus3.4.3.4 等(共 41 个)
    ) D. ^5 |8 f+ Q  `zuul-sample(com.netflix.zuul)https://github.com/Netflix/zuul2.3.0 等(共 10 个)  w" }" b; F  u* C* c
    watson-data-api-client(com.ibm.watson.data)https://github.com/OpenAPITools/openapi-generator0.1 等(共 1 个)1 T8 q/ J0 O3 b" t5 F# ?4 T
    spring-boot-admin-sample-consul(de.codecentric)https://github.com/codecentric/spring-boot-admin2.5.4 等(共 40 个)
    6 B1 n& F) Z0 ?; ^0 W4 Y) F; ujedis(redis.clients)https://github.com/redis/jedisjedis-3.6.2 等(共 36 个)
    - V8 w  i: K. o& b5 X' jgrpc-benchmarks(io.grpc)https://github.com/grpc/grpc-java1.9.1 等(共 65 个)
    ' V' y: H' a) p: f9 I5 r# W" O0 Nktor-client-json-tests(io.ktor)https://github.com/ktorio/ktor1.6.7 等(共 32 个)
    + e5 V5 c# _+ q8 a4 Tgitbucket_2.13(io.github.gitbucket)https://github.com/gitbucket/gitbucket4.32.0 等(共 27 个). u+ d3 o9 B* x
    finagle-zipkin_2.12(com.twitter)https://github.com/twitter/finagle7.1.0 等(共 56 个)
      y! ?1 M9 z/ y+ Kresilience4j-vertx(io.github.resilience4j)https://github.com/resilience4j/resilience4j0.9.0 等(共 9 个)4 h$ _  \" C+ S0 {: Q& o
    elasticsearch-sql(org.nlpcn)https://github.com/NLPchina/elasticsearch-sql6.8.13.0 等(共 9 个)
    4 r1 f4 l' U) vexposed-spring-boot-starter(org.jetbrains.exposed)https://github.com/JetBrains/Exposed0.36.2 等(共 11 个)
    4 h3 [- `9 B. G" N3 U6 wblade-sql2o(com.bladejava)https://github.com/lets-blade/blade1.2.9 等(共 1 个)$ h! T. g5 h9 l
    netty-socketio(com.corundumstudio.socketio)https://github.com/mrniko/netty-socketio1.7.19 等(共 8 个)+ e0 {; C1 M) s' t' X
    springfox-swagger2(io.springfox)https://github.com/springfox/springfox2.10.5 等(共 6 个)4 n% _. c+ S, l+ o% ]7 U
    main_2.12(org.scala-sbt)https://github.com/sbt/sbt1.6.0-RC1 等(共 88 个)+ `4 i- f9 N- o) P  [7 \2 N
    lettuce-core(io.lettuce)https://github.com/lettuce-io/lettuce-core6.1.5.RELEASE 等(共 42 个)4 L: I" k! E# p6 M  A  r* u7 H
    repository-azure(org.opensearch.plugin)https://github.com/opensearch-project/OpenSearch1.2.0 等(共 3 个)( z2 l8 v( t& J6 D$ a. G
    reactor-test(io.projectreactor)https://github.com/reactor/reactor-core3.3.4.RELEASE 等(共 3 个)
    ( \: g  U9 G* H4 e: O4 Kcorda-webserver-impl(net.corda)https://github.com/corda/cordacorda-3.0 等(共 32 个): {1 U0 b+ X, O5 Z+ D" p: t9 Q, H, C
    conductor-redis-persistence(com.netflix.conductor)https://github.com/Netflix/conductor3.3.6 等(共 100 个)
    2 ?4 U3 q4 J4 l3 j2 S+ _armeria(com.linecorp.armeria)https://github.com/line/armeria0.26.1.Final 等(共 2 个)8 K9 G7 d4 e& i8 G" c+ h, i$ b! N+ `
    breeze-parent_2.13(org.scalanlp)https://github.com/scalanlp/breeze2.0.1-RC1 等(共 5 个)
    7 F3 P1 J( X! Lmicrometer-core(io.micrometer)https://github.com/micrometer-metrics/micrometer1.8.1 等(共 98 个)
    ( S! W+ ]- C; h! L2 Aalink_connector_jdbc_sqlite_flink-1.9_2.11(com.alibaba.alink)https://github.com/alibaba/Alink1.5.1 等(共 3 个)) T& V0 F4 I/ V0 w
    initializr-actuator(io.spring.initializr)https://github.com/spring-io/initializr0.9.0 等(共 6 个)4 H2 M* e3 f! P( l1 l* E1 Z: _, |
    telegrambots-spring-boot-starter(org.telegram)https://github.com/rubenlagus/TelegramBots4.9.1 等(共 17 个)
    % f, H0 A! ?4 ospring-data-elasticsearch(org.springframework.data)https://github.com/spring-projects/spring-data-elasticsearch4.3.0 等(共 86 个)
    7 P" L( l# E# a0 |! |feast-common(dev.feast)https://github.com/feast-dev/feast0.9.2 等(共 26 个): k7 O; ]( m8 R- h4 `
    javamelody-core(net.bull.javamelody)https://github.com/javamelody/javamelody1.88.0 等(共 13 个)
      n8 v7 O" L" n! Fanalytics-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)
    9 F7 y9 e3 s3 u% b8 ?! @scio-tensorflow_2.13(com.spotify)https://github.com/spotify/scio0.9.6 等(共 97 个)! i8 ^& B  x2 h- b6 |5 t, K
    grpc-client-spring-boot-autoconfigure(net.devh)https://github.com/yidongnan/grpc-spring-boot-starter2.9.0.RELEASE 等(共 16 个)
    7 D5 i2 Q3 K. d/ n2 j$ linject-server_2.12(com.twitter)https://github.com/twitter/finatra21.9.0 等(共 56 个)
    2 O8 |& w  s  a; \  Y) {client-java-examples(io.kubernetes)https://github.com/kubernetes-client/java8.0.2 等(共 1 个)
    " `  H1 y/ d% Creactivesocket-tck-drivers(io.reactivesocket)https://github.com/rsocket/rsocket-java0.6.0 等(共 1 个)
    ( D2 a+ Z1 k2 p8 E- p3 t0 {jest-droid(io.searchbox)https://github.com/searchbox-io/Jest6.3.1 等(共 8 个)  J6 Z+ e2 Y9 m3 p8 z# {
    graphql-dgs-example-java-webflux(com.netflix.graphql.dgs)https://github.com/Netflix/dgs-framework4.9.7 等(共 36 个)
    * R  F# M- \% N5 |, C) J9 tquill-jdbc-monix_2.11(io.getquill)https://github.com/getquill/quill3.9.0 等(共 62 个)
    7 B6 i6 X5 `' ~0 xdoobie-quill_2.12(org.tpolecat)https://github.com/tpolecat/doobie1.0.0-RC1 等(共 61 个)% k; z/ H$ t! I  W* e+ a# B' _
    http4k(org.http4k)https://github.com/http4k/http4k4.3.4.1 等(共 3 个)
    $ n* b8 u4 {% l9 E- g1 oelasticsearch-hadoop(org.elasticsearch)https://github.com/elastic/elasticsearch-hadoop8.0.0-beta1 等(共 100 个)$ h3 `8 ?5 a% e* v6 x9 f0 k
    sbt-shading(io.get-coursier)https://github.com/coursier/coursier1.0.0-RC8 等(共 1 个)4 j' s3 l/ V6 A: H, U
    spark-cassandra-connector-unshaded_2.10(com.datastax.spark)https://github.com/datastax/spark-cassandra-connector2.0.9 等(共 54 个)/ ^3 I8 \' S9 }  ?: d1 j% D$ f- |! d6 C
    webdrivermanager(io.github.bonigarcia)https://github.com/bonigarcia/webdrivermanager4.0.0 等(共 15 个)
    . M0 y3 Z. p! b% {( hcommon-auth-v3(com.tencent.bk.devops.ci.common)https://github.com/Tencent/bk-ci1.2.0-rc.7-RELEASE 等(共 3 个)  m) B6 w( G$ |3 J
    reactor-netty(io.projectreactor.netty)https://github.com/reactor/reactor-netty1.0.9 等(共 75 个)! d" k! T4 M- U% k+ Q3 b/ F
    evcache-client-sample(com.netflix.evcache)https://github.com/Netflix/EVCache5.18.9 等(共 63 个)
    9 ~/ N# X8 H% q& i1 x1 j# F7 c( x' axtdb-test(com.xtdb)https://github.com/xtdb/xtdb1.20.0 等(共 9 个); S+ k6 l  L8 m- e) x' v) P
    transport-netty4(com.strapdata.elasticsearch.plugin)https://github.com/strapdata/elassandra6.2.3.31 等(共 14 个)5 N0 f# l$ _6 o$ H  L" Q# H5 r
    sbt-metals(org.scalameta)https://github.com/scalameta/metals0.9.9 等(共 17 个)
    0 C. m  U& t) c. g; a% felastic4s-embedded_2.12(com.sksamuel.elastic4s)https://github.com/sksamuel/elastic4s6.7.8 等(共 100 个)
    ; e1 \. x; @! ~1 `4 v7 Dgenie-agent(com.netflix.genie)https://github.com/Netflix/genie4.0.4 等(共 100 个)) ?& O: |& U* N7 E8 T. F; R% A  y
    spring-kafka(org.springframework.kafka)https://github.com/spring-projects/spring-kafka2.7.9 等(共 79 个)% t" g2 J7 K& [4 M' y2 t2 V. L
    db-async-common_2.13(com.dripower)https://github.com/mauricio/postgresql-async0.3.109 等(共 19 个)
    , F2 {, @0 d; p* Q% Z7 D  t$ v9 nselenide(com.codeborne)https://github.com/selenide/selenide5.25.0-selenium-4.0.0-rc-2 等(共 18 个)& f& C8 g( i" L$ Y" @* ]% t
    cloudfoundry-identity-server(org.cloudfoundry.identity)https://github.com/cloudfoundry/uaa4.30.0 等(共 1 个)
    " g, ^5 W  n4 b" Oservo-atlas(com.netflix.servo)https://github.com/Netflix/servo0.13.2 等(共 20 个), Q8 U" K  k( V. B
    rxnetty-spectator-tcp(io.reactivex)https://github.com/ReactiveX/RxNetty0.5.3-rc.4 等(共 12 个)
    : m6 T% K3 ~4 }0 ^mleap-tensorflow_2.10(ml.combust.mleap)https://github.com/combust/mleap0.9.6 等(共 25 个)
    : {2 W7 y# L! ?1 ]" n9 U6 [  ?0 ^spark-testing-base_2.12(com.holdenkarau)https://github.com/holdenk/spark-testing-base2.4.4_1.1.1 等(共 100 个)
    0 @& @0 |6 d7 [1 S- q3 G. agraphql-kotlin-spring-client(com.expediagroup)https://github.com/ExpediaGroup/graphql-kotlin5.0.0-alpha.0 等(共 20 个)
    8 `+ m, F5 ~  D- Wgraphql-spring-boot-test-autoconfigure(com.graphql-java-kickstart)https://github.com/graphql-java-kickstart/graphql-spring-boot8.1.1 等(共 33 个)
    + u5 a: L* v- H& g! s# rdiscord4j-rest(com.discord4j)https://github.com/Discord4J/Discord4J3.2.1 等(共 15 个)
    ! F9 Z% l4 ?) K, }5 G- D) Btwitter-server-logback-classic_2.13(com.twitter)https://github.com/twitter/twitter-server21.9.0 等(共 54 个)* j& [0 z! E" M4 F% L
    synthea(org.mitre.synthea)https://github.com/synthetichealth/synthea2.7.0 等(共 2 个)5 Z+ J% _' i  C: I% n
    spring-integration-redis(org.springframework.integration)https://github.com/spring-projects/spring-integration5.5.6 等(共 30 个)
    & f$ D1 c/ K$ i7 T: h+ k% a8 W( tcyclops-reactor-integration(com.oath.cyclops)https://github.com/aol/cyclops10.4.0 等(共 1 个)9 ~( B# h! ~/ w) X8 B
    akka-stream-alpakka-geode_2.12(com.lightbend.akka)https://github.com/akka/alpakka1.0-M1 等(共 13 个)
    ( h  }) _0 \4 r) D! `& b$ e" kmantis-client(io.mantisrx)https://github.com/Netflix/mantis1.3.9 等(共 83 个)
    5 R2 p( C( s+ L, [mybatis-generator-plugin(com.itfsw)https://github.com/itfsw/mybatis-generator-plugin1.2.9 等(共 31 个)
    " I1 N" G6 ]7 M" v. M+ m; B* @& Kktorm-support-sqlserver(org.ktorm)https://github.com/kotlin-orm/ktorm3.3.0 等(共 11 个)
    & w( S! x6 F9 E& V. w/ Ygatk(org.broadinstitute)https://github.com/broadinstitute/gatk4.beta.2 等(共 39 个)
    9 [) M! r5 G# }0 T  qazure-messaging-servicebus(com.azure)https://github.com/Azure/azure-sdk-for-java7.5.1 等(共 100 个)
    - W, Z# W5 v% Pmica-metrics(net.dreamlu)https://github.com/lets-mica/mica2.5.7 等(共 7 个)
    . q1 Y( N- u7 l8 Pshiro-redis(org.crazycake)https://github.com/alexxiyang/shiro-redis3.3.1 等(共 2 个)+ D6 l* u0 V  u
    enumeratum-play_2.12(com.beachape)https://github.com/lloydmeta/enumeratum1.5.16 等(共 2 个)
    * n0 s  b7 i9 C3 }5 H% U! Jjdonframework(org.jdon)https://github.com/banq/jdonframework6.6.8 等(共 1 个)! Q  D7 u: @8 u' k; z2 ^5 Y
    weid-java-sdk(com.webank)https://github.com/WeBankBlockchain/WeIdentity1.8.1 等(共 3 个)
    6 P" K7 I1 D' q. Z& Z- flog-protocol(io.shulie.pradar)https://github.com/shulieTech/Takin2.0.3 等(共 3 个)
    , S. G' P2 g$ U+ H9 z: s. Q; t6 @5 Kmicro-boot(com.oath.microservices)https://github.com/aol/micro-server1.2.6 等(共 38 个)+ D. z9 b6 ^+ K
    sparkling-water-package_2.11(ai.h2o)https://github.com/h2oai/sparkling-water2.4.10 等(共 36 个)' q1 ^% q" g. c! z% s4 O* {% M
    scalatest_2.13(au.com.dius.pact.provider)https://github.com/pact-foundation/pact-jvm4.2.4 等(共 5 个). F0 e6 u1 O( J9 R0 B- H* O! H" t
    mssql-jdbc(com.microsoft.sqlserver)https://github.com/microsoft/mssql-jdbc8.3.0.jre11-preview 等(共 100 个)
    + k* m( }9 }. b3 m& D  kelide-spring-boot-starter(com.yahoo.elide)https://github.com/yahoo/elide6.0.3 等(共 45 个)% ~: n, S. }0 O3 i; C5 q
    kafka-connect-elastic5(com.datamountaineer)https://github.com/lensesio/stream-reactor1.2.0 等(共 5 个)
    7 @0 x9 g. [0 R  W; Qkvision-server-spring-boot-jvm(io.kvision)https://github.com/rjaros/kvision5.4.3 等(共 9 个)* a1 q9 o) j$ {* g. H* g# f
    r2dbc-postgresql(org.postgresql)https://github.com/pgjdbc/r2dbc-postgresql0.9.0.RC1 等(共 8 个)
      b9 U: P! a* Yplay-slick-evolutions_2.13(com.typesafe.play)https://github.com/playframework/play-slick5.0.0-RC3 等(共 29 个)
    1 r0 h( F+ |# X7 d6 F! Csbt-bloop-core(ch.epfl.scala)https://github.com/scalacenter/bloop1.4.8-43-c2d941d9 等(共 29 个)
    $ j- ^3 @/ R0 O" [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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