CVE-2021-27246: tp-link ac1750_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2021-27246 is a high (CVSS 8.0) Stack-based Buffer Overflow vulnerability in tp-link ac1750_firmware. EPSS estimates a 6.60% chance of exploitation in the next 30 days, higher than 93.8% of scored vulnerabilities.

Timeline

1. 14-04-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of MAC addresses by the tdpServer endpoint. A crafted TCP message can write stack pointers to the stack. An attacker can leverage this vulnerability to execute code in the context of the root user. Was ZDI-CAN-12306.

• 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).