VulnerabilityModified
CVE-2021-33823
Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted.
HIGH 7.5EPSS 1.32%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. Then the web server is denial-of-service.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.32% probability · 69th percentile
- CISA KEV
- Not listed
- Affected
- moxa/mgate mb3180 firmware
- Source
- cve@mitre.org
References
- https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.mdExploit, Third Party Advisory
- https://www.moxa.com/en/products/industrial-edge-connectivity/protocol-gateways/modbus-tcp-gateways/mgate-mb3180-mb3280-mb3480-seriesProduct, Vendor Advisory
- https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33823.mdExploit, Third Party Advisory
- https://www.moxa.com/en/products/industrial-edge-connectivity/protocol-gateways/modbus-tcp-gateways/mgate-mb3180-mb3280-mb3480-seriesProduct, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.