Description
Multiple improper input validation flaws were identified in some CLI commands of Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series firmware versions 4.32 through 5.21, VPN series firmware versions 4.30 through 5.21, NSG series firmware versions 1.00 through 1.33 Patch 4, NXC2500 firmware version 6.10(AAIG.3) and earlier versions, NAP203 firmware version 6.25(ABFA.7) and earlier versions, NWA50AX firmware version 6.25(ABYW.5) and earlier versions, WAC500 firmware version 6.30(ABVS.2) and earlier versions, and WAX510D firmware version 6.30(ABTF.2) and earlier versions, that could allow a local authenticated attacker to cause a buffer overflow or a system crash via a crafted payload.
CVSS breakdown
Affected products
- Zyxel / ATP series firmware4.32 through 5.21 – 4.32 through 5.21
- Zyxel / NAP203 firmware<= 6.25(ABFA.7) – <= 6.25(ABFA.7)
- Zyxel / NSG series firmware1.00 through 1.33 Patch 4 – 1.00 through 1.33 Patch 4
- Zyxel / NWA50AX firmware<= 6.25(ABYW.5) – <= 6.25(ABYW.5)
- Zyxel / NXC2500 firmware<= 6.10(AAIG.3) – <= 6.10(AAIG.3)
- Zyxel / USG FLEX series firmware4.50 through 5.21 – 4.50 through 5.21
- Zyxel / USG/ZyWALL series firmware4.09 through 4.71 – 4.09 through 4.71
- Zyxel / VPN series firmware4.30 through 5.21 – 4.30 through 5.21
- Zyxel / WAC500 firmware<= 6.30(ABVS.2) – <= 6.30(ABVS.2)
- Zyxel / WAX510D firmware<= 6.30(ABTF.2) – <= 6.30(ABTF.2)
References
- MISChttps://www.zyxel.com/support/multiple-vulnerabilities-of-firewalls-AP-controllers-and-APs.shtml
- MAILING_LISThttp://seclists.org/fulldisclosure/2022/Jun/15
- EXPLOIThttp://packetstormsecurity.com/files/167464/Zyxel-Buffer-Overflow-Format-String-Command-Injection.html
- EXPLOIThttp://packetstormsecurity.com/files/177036/Zyxel-zysh-Format-String-Proof-Of-Concept.html