CVE-2021-25980 : What You Need to Know
Learn about CVE-2021-25980 affecting Talkyard versions that allows attackers to reset passwords via Host Header Injection, leading to unauthorized account access. Update to tyse-v0.2021.29-8cb7f73fe-regular or later for protection.
In Talkyard, versions v0.04.01 through v0.6.74-WIP-63220cb, v0.2020.22-WIP-b2e97fe0e through v0.2021.02-WIP-879ef3fe1 and tyse-v0.2021.02-879ef3fe1-regular through tyse-v0.2021.28-af66b6905-regular, are vulnerable to Host Header Injection. An unauthenticated attacker can exploit this to reset the victim's password through the 'forgot password' functionality and gain control of the account.
Understanding CVE-2021-25980
This vulnerability allows attackers to manipulate the host header, leading to account takeover in Talkyard.
What is CVE-2021-25980?
CVE-2021-25980 is a security flaw in Talkyard that enables an attacker to reset a victim's password through Host Header Injection and subsequently compromise their account.
The Impact of CVE-2021-25980
The vulnerability has a CVSS base score of 8.8, categorizing it as a high severity issue. It has a low attack complexity but requires user interaction, with a significant impact on confidentiality, integrity, and availability.
Technical Details of CVE-2021-25980
This section outlines the specifics of the vulnerability.
Vulnerability Description
The vulnerability lies in the improper handling of the host header, allowing unauthorized password resets.
Affected Systems and Versions
Versions of Talkyard from v0.04.01 to v0.6.74-WIP-63220cb, v0.2020.22-WIP-b2e97fe0e to v0.2021.02-WIP-879ef3fe1, and tyse-v0.2021.02-879ef3fe1-regular to tyse-v0.2021.28-af66b6905-regular are impacted.
Exploitation Mechanism
By enticing a user to click a crafted link, the attacker triggers the 'forgot password' feature, resetting the victim's password and gaining unauthorized access.
Mitigation and Prevention
Protecting systems from CVE-2021-25980 is crucial for maintaining security.
Immediate Steps to Take
Users should update to tyse-v0.2021.29-8cb7f73fe-regular or later to mitigate the vulnerability.
Long-Term Security Practices
Employ security best practices such as avoiding clicking on untrusted links to prevent similar attacks.
Patching and Updates
Regularly apply security patches and updates to safeguard against known vulnerabilities.