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Apache Log4j2 远程代码执行漏洞

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  • TA的每日心情
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    前天 10:28
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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
      9 t# K$ v% g1 }- J
    受影响开源组件
    项目
    仓库地址
    版本
    8 G* i# G% _# o
    elasticsearch(org.elasticsearch)https://github.com/elastic/elasticsearch8.0.0-alpha2 等(共 100 个)
    $ q! i5 _' I* `5 _% ?+ E8 Mspring-webflux(org.springframework)https://github.com/spring-projects/spring-framework5.2.6.RELEASE 等(共 40 个)
    7 e6 W8 P: f$ |# K8 c* _druid(com.alibaba)https://github.com/alibaba/druid1.2.8 等(共 68 个)
    # r. U* Y& R5 m- @- Chystrix-rx-netty-metrics-stream(com.netflix.hystrix)https://github.com/Netflix/Hystrix1.5.4 等(共 2 个)
    / k4 d1 b, n$ h" u6 X- a. ospring-cloud-starter-alibaba-sentinel(com.alibaba.cloud)https://github.com/alibaba/spring-cloud-alibaba2021.1 等(共 14 个)8 E1 u/ `9 N' i7 }- g" K1 M
    spring-boot-starter-ahas-sentinel-client(com.alibaba.csp)https://github.com/alibaba/Sentinel1.3.2 等(共 17 个)$ j1 k8 T4 F8 m# U) \
    redisson(org.redisson)https://github.com/redisson/redisson2.2.24 等(共 3 个)
    + u/ N7 U: O! D* [5 fHikariCP(com.zaxxer)https://github.com/brettwooldridge/HikariCP5.0.0 等(共 27 个)5 ^% _2 z, ?0 J9 }2 {( c
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    $ }' y4 a# M1 M* B( ymybatis-plus(com.baomidou)https://github.com/baomidou/mybatis-plus3.4.3.4 等(共 41 个): A, f6 h& f1 S0 g
    zuul-sample(com.netflix.zuul)https://github.com/Netflix/zuul2.3.0 等(共 10 个)+ @9 Q: c0 T/ ?, h4 y% a: o; a3 r
    watson-data-api-client(com.ibm.watson.data)https://github.com/OpenAPITools/openapi-generator0.1 等(共 1 个)1 ?! M1 o& m* _) B9 l
    spring-boot-admin-sample-consul(de.codecentric)https://github.com/codecentric/spring-boot-admin2.5.4 等(共 40 个)
    2 I$ i7 u+ l* p  K' F6 ~, F% A! Pjedis(redis.clients)https://github.com/redis/jedisjedis-3.6.2 等(共 36 个)
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    finagle-zipkin_2.12(com.twitter)https://github.com/twitter/finagle7.1.0 等(共 56 个)/ R2 F8 o$ i1 D' L
    resilience4j-vertx(io.github.resilience4j)https://github.com/resilience4j/resilience4j0.9.0 等(共 9 个)# O( y+ t7 a/ G. I1 B
    elasticsearch-sql(org.nlpcn)https://github.com/NLPchina/elasticsearch-sql6.8.13.0 等(共 9 个)" @, B& u$ N& p4 o! `
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    0 S. ?- L: Z" T( y0 ]) b- ]. iblade-sql2o(com.bladejava)https://github.com/lets-blade/blade1.2.9 等(共 1 个)
    , L3 C+ f: q& K' Qnetty-socketio(com.corundumstudio.socketio)https://github.com/mrniko/netty-socketio1.7.19 等(共 8 个)0 Z6 a6 c6 r/ N: x0 q
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    corda-webserver-impl(net.corda)https://github.com/corda/cordacorda-3.0 等(共 32 个)
    ! c/ c& {8 t6 D4 H4 ?conductor-redis-persistence(com.netflix.conductor)https://github.com/Netflix/conductor3.3.6 等(共 100 个)5 e  ^+ E+ Y. l) z: b
    armeria(com.linecorp.armeria)https://github.com/line/armeria0.26.1.Final 等(共 2 个)
    . K( W! }6 d4 T  @! B1 Fbreeze-parent_2.13(org.scalanlp)https://github.com/scalanlp/breeze2.0.1-RC1 等(共 5 个)8 C. o: U0 K. l. o6 l* O! k2 y6 q8 E" g
    micrometer-core(io.micrometer)https://github.com/micrometer-metrics/micrometer1.8.1 等(共 98 个); |+ g1 q! j' @# Y" i# @
    alink_connector_jdbc_sqlite_flink-1.9_2.11(com.alibaba.alink)https://github.com/alibaba/Alink1.5.1 等(共 3 个); q! v* W7 X4 b( D2 [0 O
    initializr-actuator(io.spring.initializr)https://github.com/spring-io/initializr0.9.0 等(共 6 个)
    ) k: `* f5 E- c2 Vtelegrambots-spring-boot-starter(org.telegram)https://github.com/rubenlagus/TelegramBots4.9.1 等(共 17 个)
    / B0 o- b0 C9 {2 i7 r8 Dspring-data-elasticsearch(org.springframework.data)https://github.com/spring-projects/spring-data-elasticsearch4.3.0 等(共 86 个)" F4 O5 I6 Z2 g( i, l! V
    feast-common(dev.feast)https://github.com/feast-dev/feast0.9.2 等(共 26 个)
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    scio-tensorflow_2.13(com.spotify)https://github.com/spotify/scio0.9.6 等(共 97 个)
    1 g9 f+ T3 p* o1 j  s9 Egrpc-client-spring-boot-autoconfigure(net.devh)https://github.com/yidongnan/grpc-spring-boot-starter2.9.0.RELEASE 等(共 16 个)
    ! {! g, e. D2 Q: H& C9 L1 v8 sinject-server_2.12(com.twitter)https://github.com/twitter/finatra21.9.0 等(共 56 个)( E" I) e- N- C3 B! u/ Y
    client-java-examples(io.kubernetes)https://github.com/kubernetes-client/java8.0.2 等(共 1 个)  _! ^+ s( i2 L! j( ?. k  a
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    3 {" x. [* G0 b5 c  Ijest-droid(io.searchbox)https://github.com/searchbox-io/Jest6.3.1 等(共 8 个)* a) t  }# m9 T4 P
    graphql-dgs-example-java-webflux(com.netflix.graphql.dgs)https://github.com/Netflix/dgs-framework4.9.7 等(共 36 个)# |0 _$ ?2 f0 p
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    " j" y) f2 E7 n4 M% nhttp4k(org.http4k)https://github.com/http4k/http4k4.3.4.1 等(共 3 个)
    2 \- N& h3 V5 z9 \elasticsearch-hadoop(org.elasticsearch)https://github.com/elastic/elasticsearch-hadoop8.0.0-beta1 等(共 100 个)1 s4 B" v' s% W. v) s( x
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    ' ~0 R, u4 W# Z9 q, Vwebdrivermanager(io.github.bonigarcia)https://github.com/bonigarcia/webdrivermanager4.0.0 等(共 15 个)6 @& s: w& X! L- y9 B. ^
    common-auth-v3(com.tencent.bk.devops.ci.common)https://github.com/Tencent/bk-ci1.2.0-rc.7-RELEASE 等(共 3 个)1 z# d" ~6 u( x2 N) A
    reactor-netty(io.projectreactor.netty)https://github.com/reactor/reactor-netty1.0.9 等(共 75 个)) R/ V5 m' x# a9 [/ G. V
    evcache-client-sample(com.netflix.evcache)https://github.com/Netflix/EVCache5.18.9 等(共 63 个)2 A8 v/ q4 o* }+ ~1 p
    xtdb-test(com.xtdb)https://github.com/xtdb/xtdb1.20.0 等(共 9 个)6 q) e4 f6 D" }7 x) w
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    sbt-metals(org.scalameta)https://github.com/scalameta/metals0.9.9 等(共 17 个)
    , y! s, D8 [9 e9 R: v3 N* o+ G) aelastic4s-embedded_2.12(com.sksamuel.elastic4s)https://github.com/sksamuel/elastic4s6.7.8 等(共 100 个)
    0 |) @' W! k  Ygenie-agent(com.netflix.genie)https://github.com/Netflix/genie4.0.4 等(共 100 个)
    % X" I" V$ Z6 e6 Y( Z) Hspring-kafka(org.springframework.kafka)https://github.com/spring-projects/spring-kafka2.7.9 等(共 79 个)
    7 \& J1 t$ `, X7 i3 ]) U8 ]db-async-common_2.13(com.dripower)https://github.com/mauricio/postgresql-async0.3.109 等(共 19 个)7 O( R0 E+ \; W
    selenide(com.codeborne)https://github.com/selenide/selenide5.25.0-selenium-4.0.0-rc-2 等(共 18 个). n" ~/ Q; C) i) j
    cloudfoundry-identity-server(org.cloudfoundry.identity)https://github.com/cloudfoundry/uaa4.30.0 等(共 1 个)' l/ h% u- f7 S* n
    servo-atlas(com.netflix.servo)https://github.com/Netflix/servo0.13.2 等(共 20 个)
    : c. j; ^6 w9 u+ ^2 b& Drxnetty-spectator-tcp(io.reactivex)https://github.com/ReactiveX/RxNetty0.5.3-rc.4 等(共 12 个)( g/ E9 B2 `- v+ _, r
    mleap-tensorflow_2.10(ml.combust.mleap)https://github.com/combust/mleap0.9.6 等(共 25 个)
    ) E  h( n  G% W  C* p8 D' U- V- w! Wspark-testing-base_2.12(com.holdenkarau)https://github.com/holdenk/spark-testing-base2.4.4_1.1.1 等(共 100 个)
    & E; X, o1 S, T0 T" r' igraphql-kotlin-spring-client(com.expediagroup)https://github.com/ExpediaGroup/graphql-kotlin5.0.0-alpha.0 等(共 20 个)
    ; M' g& q* |) H5 {' \; Jgraphql-spring-boot-test-autoconfigure(com.graphql-java-kickstart)https://github.com/graphql-java-kickstart/graphql-spring-boot8.1.1 等(共 33 个)% ]; a" }7 B/ T2 f$ [9 D8 |  P
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    : `/ \4 m( [7 S$ d  rtwitter-server-logback-classic_2.13(com.twitter)https://github.com/twitter/twitter-server21.9.0 等(共 54 个)
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    # L1 F2 ]  N4 \1 W* V/ {$ y2 m0 jakka-stream-alpakka-geode_2.12(com.lightbend.akka)https://github.com/akka/alpakka1.0-M1 等(共 13 个)
    3 T6 M7 ?% W( dmantis-client(io.mantisrx)https://github.com/Netflix/mantis1.3.9 等(共 83 个): d" \/ Y% A+ H! v2 e$ g+ ?* E
    mybatis-generator-plugin(com.itfsw)https://github.com/itfsw/mybatis-generator-plugin1.2.9 等(共 31 个)
    # ~* ^2 {4 k; Y5 X8 x2 \, \: |ktorm-support-sqlserver(org.ktorm)https://github.com/kotlin-orm/ktorm3.3.0 等(共 11 个)* ?! s3 m/ M( K) M- B' k5 @9 G, k4 i
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    / w7 y" k) O$ X9 G1 p, Y) }azure-messaging-servicebus(com.azure)https://github.com/Azure/azure-sdk-for-java7.5.1 等(共 100 个)
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    : q$ P/ z9 F5 r) Zenumeratum-play_2.12(com.beachape)https://github.com/lloydmeta/enumeratum1.5.16 等(共 2 个)4 i. {! w8 ?' E6 O) I# b3 m, l
    jdonframework(org.jdon)https://github.com/banq/jdonframework6.6.8 等(共 1 个)0 d6 g  x  J4 u" l4 W1 f  D; a% Q
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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.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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