What’s Vulnerable › Vulnerabilities

CVE-2020-29057

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-24 · updated 2026-06-17

Description

An issue was discovered on CDATA 72408A, 9008A, 9016A, 92408A, 92416A, 9288, 97016, 97024P, 97028P, 97042P, 97084P, 97168P, FD1002S, FD1104, FD1104B, FD1104S, FD1104SN, FD1108S, FD1204S-R2, FD1204SN, FD1204SN-R2, FD1208S-R2, FD1216S-R1, FD1608GS, FD1608SN, FD1616GS, FD1616SN, and FD8000 devices. It allows remote attackers to cause a denial of service (reboot) by sending random bytes to the telnet server on port 23, aka a "shawarma" attack.

Affected products

• Cdatatec 72408A Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 9008A Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 9016A Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 92408A Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 92416A Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 9288 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 97016 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 97024P Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 97028P Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 97042P Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 97084P Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec 97168P Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1002S Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1104 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1104B Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1104S Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1104Sn Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1108S Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1204S-R2 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1204Sn-R2 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1204Sn Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1208S-R2 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1216S-R1 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1608Gs Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1608Sn Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1616Gs Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd1616Sn Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000
• Cdatatec Fd8000 Firmware: 1.2.2, 2.4.03_000, 2.4.04_001, 2.4.05_000

References

• https://pierrekim.github.io/blog/2020-07-07-cdata-olt-0day-vulnerabilities.html
• https://pierrekim.github.io/blog/2020-07-07-cdata-olt-0day-vulnerabilities.html

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