CVE-2020-5290 : What You Need to Know

In RedpwnCTF before version 2.3, a session fixation vulnerability exists, allowing attackers to potentially steal flags by manipulating the session hash. This could lead to unauthorized access and exploitation of victim teams.

Understanding CVE-2020-5290

This CVE involves a session fixation vulnerability in RedpwnCTF before version 2.3, enabling attackers to exploit the session hash and gain unauthorized access to victim teams' accounts.

What is CVE-2020-5290?

In RedpwnCTF before version 2.3, a session fixation vulnerability allows attackers to manipulate the session hash, potentially leading to unauthorized access to victim teams' accounts.

The Impact of CVE-2020-5290

CVSS Score: 6.5 (Medium)
Attack Complexity: High
Attack Vector: Network
Integrity Impact: High
User Interaction: Required
Scope: Changed
Attackers could exploit this vulnerability to steal flags and gain points by signing victim teams into the attacker's account.

Technical Details of CVE-2020-5290

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in RedpwnCTF before version 2.3 allows attackers to fixate sessions, potentially leading to unauthorized access and exploitation of victim teams.

Affected Systems and Versions

Affected Product: rctf
Vendor: redpwn
Vulnerable Versions: < 2.3

Exploitation Mechanism

Attackers can exploit the

#token=$ssid

hash when making a request to the

/verify

endpoint, enabling them to fixate sessions and gain unauthorized access.

Mitigation and Prevention

To address CVE-2020-5290, follow these mitigation strategies:

Immediate Steps to Take

Update RedpwnCTF to version 2.3 or later to apply the patch.
Monitor for any unauthorized access or suspicious activities.

Long-Term Security Practices

Regularly audit and review session management mechanisms.
Educate users on the importance of secure session handling.

Patching and Updates

Apply security patches promptly to prevent exploitation of known vulnerabilities.