CVE-2018-10561 on CISA KEV

An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then ma

01What CISA says about this vulnerability

An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then manage the device.

02Required action — verbatim from CISA

The impacted product is end-of-life and should be disconnected if still in use.

03Notes & references

• www.securityfocus.com — http://www.securityfocus.com/bid/107053
• www.exploit-db.com — https://www.exploit-db.com/exploits/44576/
• www.vpnmentor.com — https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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