Information Exposure Through Timing Discrepancy in M2Crypto - CVE-2020-25657
Published: July 26, 2022 / Updated: February 18, 2025
Vulnerability identifier: #VU65771
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-25657
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Ng Pheng Siong
Affected software:
M2Crypto
M2Crypto
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to possibility of the Bleichenbacher timing attack in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. A remote attacker can gain access to sensitive information.
How to mitigate CVE-2020-25657
Install update from vendor's website.