by Kastro
Paper/Archive/CVE-2023-28771

CVE-2023-28771

Zyxel ZyWALL/USG series firmware — Zyxel Multiple Firewalls OS Command Injection Vulnerability

KEV · due 21 JunEPSS 99%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
99
CVSS 9.8 (CNA)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 99.9.999 × 2020.0Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.

Affected

ProductAffectedFixed inSource
ZyWALL/USG series firmware4.60 through 4.73–CNA
VPN series firmware4.60 through 5.35–CNA
USG FLEX series firmware4.60 through 5.35–CNA
ATP series firmware4.60 through 5.35–CNA

Scores by source

Zyxel (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

refzyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewallsrefpacketstormsecurity.com/files/172820/Zyxel-IKE-Packet-Decoder-Unauthenticated-Remote-Code-Execution.htmlrefcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28771kevcisa.gov/known-exploited-vulnerabilities-catalog