CVE-2020-20950 : What You Need to Know
Learn about CVE-2020-20950, a vulnerability in Microchip Libraries for Applications allowing Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA, leading to remote information disclosure. Find mitigation steps and prevention measures.
Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in Microchip Libraries for Applications 2018-11-26 All up to 2018-11-26. The vulnerability can allow one to use Bleichenbacher's oracle attack to decrypt an encrypted ciphertext by making successive queries to the server using the vulnerable library, resulting in remote information disclosure.
Understanding CVE-2020-20950
This CVE involves a vulnerability in Microchip Libraries for Applications that can be exploited using Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA.
What is CVE-2020-20950?
Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in Microchip Libraries for Applications allows attackers to decrypt encrypted data through a series of queries, leading to remote information disclosure.
The Impact of CVE-2020-20950
The vulnerability poses a significant risk of remote information disclosure due to the decryption capability granted to attackers using Bleichenbacher's oracle attack.
Technical Details of CVE-2020-20950
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability in Microchip Libraries for Applications enables attackers to exploit Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA, facilitating the decryption of encrypted data.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: All versions up to 2018-11-26
Exploitation Mechanism
Attackers can leverage Bleichenbacher's oracle attack by sending successive queries to the server using the vulnerable library, ultimately leading to the decryption of encrypted data.
Mitigation and Prevention
Protecting systems from CVE-2020-20950 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable or restrict access to the vulnerable library in Microchip Libraries for Applications.
- Implement network-level protections to detect and block suspicious decryption attempts.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Conduct security assessments and penetration testing to identify and mitigate potential weaknesses.
Patching and Updates
- Apply patches or updates provided by Microchip to fix the vulnerability in the affected library.