CVE-2018-4063 on CISA KEV

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3. A specially crafted HTTP request can upload a file, resulting in executable code being uploaded, and routable, to the webserver. An attacker can ma

01What CISA says about this vulnerability

An exploitable remote code execution vulnerability exists in the upload.cgi functionality of Sierra Wireless AirLink ES450 FW 4.9.3. A specially crafted HTTP request can upload a file, resulting in executable code being uploaded, and routable, to the webserver. An attacker can make an authenticated HTTP request to trigger this vulnerability.

02Required action — verbatim from CISA

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

03Notes & references

• packetstormsecurity.com — http://packetstormsecurity.com/files/152648/Sierra-Wireless-AirLink-ES450-ACEMan…
• ics-cert.us-cert.gov — https://ics-cert.us-cert.gov/advisories/ICSA-19-122-03
• www.securityfocus.com — http://www.securityfocus.com/bid/108147
• talosintelligence.com — https://talosintelligence.com/vulnerability_reports/TALOS-2018-0748

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)

Vendor	Product	Versions
n	a / Sierra Wireless	Sierra Wireless AirLink ES450 FW 4.9.3

06Detection

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