CVE-2023-37464 : Exploit Details and Defense Strategies
Discover the impact of CVE-2023-37464, a high-severity vulnerability in OpenIDC/cjose library that allows attackers to manipulate encrypted data. Learn how to mitigate the risk and ensure security of your systems.
A high-severity vulnerability has been identified in OpenIDC/cjose library, impacting versions prior to 0.6.2.2. The flaw allows an attacker to manipulate encrypted data by providing a truncated Authentication Tag. Here's what you should know:
Understanding CVE-2023-37464
What is CVE-2023-37464?
OpenIDC/cjose is a C library that implements the Javascript Object Signing and Encryption (JOSE) standards. The vulnerability lies in the AES GCM decryption routine, where the Tag length used is not correctly validated, enabling an attacker to modify encrypted data.
The Impact of CVE-2023-37464
The vulnerability poses a high risk, as an attacker can exploit it to tamper with encrypted data by providing a shorter Authentication Tag than required. This could lead to unauthorized access or data modification.
Technical Details of CVE-2023-37464
Vulnerability Description
The AES GCM decryption routine in OpenIDC/cjose incorrectly handles the Tag length, allowing attackers to modify encrypted data by providing a truncated Authentication Tag. Users are advised to upgrade to version 0.6.2.2 or newer.
Affected Systems and Versions
The vulnerability affects versions of OpenIDC/cjose library prior to 0.6.2.2.
Exploitation Mechanism
Attackers can exploit this vulnerability by providing a manipulated Authentication Tag in the JWE data, enabling unauthorized data modification.
Mitigation and Prevention
Immediate Steps to Take
Users are strongly recommended to upgrade their OpenIDC/cjose library to version 0.6.2.2 or later to mitigate the risk posed by this vulnerability.
Long-Term Security Practices
In the long term, users should follow security best practices such as regular software updates, using secure encryption algorithms, and staying informed about security advisories.
Patching and Updates
To address CVE-2023-37464, users should ensure their OpenIDC/cjose library is updated to version 0.6.2.2 or above, or consider switching to alternative encryption algorithms like AES CBC.