CVE-2023-28769: zyxel dx5401-b0_firmware Classic Buffer Overflow

Vulnerability summary

CVE-2023-28769 is a critical (CVSS 9.8) Classic Buffer Overflow vulnerability in zyxel dx5401-b0_firmware. EPSS estimates a 5.42% chance of exploitation in the next 30 days, higher than 92.6% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 27-04-2023
   PublishedVulnerability first disclosed.
2. 31-01-2025
   Last modifiedVulnerability information updated.

Description

The buffer overflow vulnerability in the library “libclinkc.so” of the web server “zhttpd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0 could allow a remote unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.

• 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.