CVE-2018-20336: asus asuswrt-merlin Classic Buffer Overflow

Vulnerability summary

CVE-2018-20336 is a high (CVSS 7.5) Classic Buffer Overflow vulnerability in asus asuswrt-merlin. EPSS estimates a 1.73% chance of exploitation in the next 30 days, higher than 77.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 17-09-2019
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

An issue was discovered in ASUSWRT 3.0.0.4.384.20308. There is a stack-based buffer overflow issue in parse_req_queries function in wanduck.c via a long string over UDP, which may lead to an information leak.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.