CVE-2020-7245

Incorrect username validation in the registration process of CTFd v2.0.0 - v2.2.2 allows an attacker to take over an arbitrary account if the username is known and emails are enabled on the CTFd instance. To exploit the vulnerability, one must register with a username identical to the victim's username, but with white space inserted before and/or after the username. This will register the account with the same username as the victim. After initiating a password reset for the new account, CTFd will reset the victim's account password due to the username collision.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 6.8 MEDIUM

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

6.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/CTFd/CTFd/releases/tag/2.2.3	Release Notes
https://github.com/CTFd/CTFd/pull/1218	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ctfd:ctfd:*:*:*:*:*:*:*:*

Information

Published : 2020-01-23 15:15

Updated : 2020-01-31 08:02

NVD link : CVE-2020-7245

Mitre link : CVE-2020-7245

JSON object : View

CWE

CWE-640

Weak Password Recovery Mechanism for Forgotten Password

Products Affected

ctfd

ctfd

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9.8 /10