Information Exposure Through Timing Discrepancy in The Bouncy Castle Crypto Package For Java - CVE-2020-15522
Published: July 20, 2021
Vulnerability identifier: #VU55035
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-15522
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Legion of the Bouncy Castle Inc.
Affected software:
The Bouncy Castle Crypto Package For Java
The Bouncy Castle Crypto Package For Java
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to sensitive information.
The
vulnerability exists due to a timing issue within the EC math library. A remote attacker who can observe timing information for the generation of multiple deterministic ECDSA signatures is able to reconstruct the private key used for encryption.
How to mitigate CVE-2020-15522
Install updates from vendor's website.