Information Exposure Through Timing Discrepancy in M2Crypto - CVE-2020-25657

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Main Vulnerability Database Vulnerabilities #VU65771

Information Exposure Through Timing Discrepancy in M2Crypto - CVE-2020-25657

Published: July 26, 2022 / Updated: February 18, 2025


Vulnerability identifier: #VU65771
CSH Severity: Medium
CVSSv4.0: 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
Vulnerable software:
M2Crypto
Software vendor:
Ng Pheng Siong

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.


Remediation

Install update from vendor's website.

External links