CVE Vulnerability

CVE-2020-24355

Zyxel VMG5313-B30B router on firmware 5.13(ABCJ.6)b3_1127, and possibly older versions of firmware are affected by insecure permissions which allows regular and other users to create new users with elevated privileges. This is done by changing "FirstIndex" field in JSON that is POST-ed during account creation. Similar may also be possible with account deletion.

10 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.zyxel.com/support/security_advisories.shtml Vendor Advisory
https://blog.somegeneric.ninja/Zyxel_VMG5153_B30B_part2 Exploit Third Party Advisory
https://blog.somegeneric.ninja/Zyxel_VMG5153_B30B Exploit Third Party Advisory
Configurations

Configuration 1
Information

Published : 2020-09-02 12:15

Updated : 2020-09-11 04:17

NVD link : CVE-2020-24355

Mitre link : CVE-2020-24355

Products Affected
No products.
CWE
CWE-732