CVE-2024-34195: totolink a3002r_firmware Out-of-bounds Write

Vulnerability summary

CVE-2024-34195 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in totolink a3002r_firmware. EPSS estimates a 0.94% chance of exploitation in the next 30 days, higher than 60.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 28-08-2024
   PublishedVulnerability first disclosed.
2. 28-08-2024
   Last modifiedVulnerability information updated.

Description

TOTOLINK AC1200 Wireless Router A3002R Firmware V1.1.1-B20200824 is vulnerable to Buffer Overflow. In the boa server program's CGI handling function formWlEncrypt, there is a lack of length restriction on the wlan_ssid field. This oversight leads to potential buffer overflow under specific circumstances. For instance, by invoking the formWlanRedirect function with specific parameters to alter wlan_idx's value and subsequently invoking the formWlEncrypt function, an attacker can trigger buffer overflow, enabling arbitrary command execution or denial of service attacks.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).