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.

CVSS v3 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3 : CRITICAL

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

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

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

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:zyxel:vmg5313-b30b_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:vmg5313-b30b:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2020-09-02 12:15

Updated : 2023-12-10 13:27

NVD link : CVE-2020-24355

Mitre link : CVE-2020-24355

CVE.ORG link : CVE-2020-24355

JSON object : View

Products Affected

zyxel

vmg5313-b30b_firmware
vmg5313-b30b

CWE

CWE-732

Incorrect Permission Assignment for Critical Resource

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