CVE-2019-13269: edimax br-6208ac_v1_firmware Improper Input Validation

Vulnerability summary

CVE-2019-13269 is a high (CVSS 8.8) Improper Input Validation vulnerability in edimax br-6208ac_v1_firmware. EPSS estimates a 0.91% chance of exploitation in the next 30 days, higher than 59.6% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 27-08-2019
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

Edimax BR-6208AC V1 devices have Insufficient Compartmentalization between a host network and a guest network that are established by the same device. A DHCP Request is sent to the router with a certain Transaction ID field. Following the DHCP protocol, the router responds with an ACK or NAK message. Studying the NAK case revealed that the router erroneously sends the NAK to both Host and Guest networks with the same Transaction ID as found in the DHCP Request. This allows encoding of data to be sent cross-router into the 32-bit Transaction ID field.

• CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.