An exploitable denial-of-service vulnerability exists in ServiceAgent functionality of the Moxa AWK-3131A, firmware version 1.13. A specially crafted packet can cause an integer underflow, triggering a large memcpy that will access unmapped or out-of-bounds memory. An attacker can send this packet while unauthenticated to trigger this vulnerability.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-5148
• https://talosintelligence.com/vulnerability_reports/TALOS-2019-0938