D-Link DIR-859 Router Command Execution Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2023-06-29
• EPSS: 90% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

The UPnP endpoint URL /gena.cgi in the D-Link DIR-859 Wi-Fi router 1.05 and 1.06B01 Beta01 allows an Unauthenticated remote attacker to execute system commands as root, by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

CISA: D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 20 Jul 2023): Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

• Patch on supportannouncement.us.dlink.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Exec…ExploitThird Party AdvisoryVDB Entry
• medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104ExploitThird Party Advisory
• medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9Broken Link
• supportannouncement.us.dlink.com/announcement/publication.aspxPatchVendor Advisory
• supportannouncement.us.dlink.com/announcement/publication.aspxPatchVendor Advisory
• www.dlink.com/en/security-bulletinVendor Advisory
• www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdfThird Party AdvisoryUS Government Resource
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource