CVE-2019-14318 Information

Description

Crypto++ 8.3.0 and earlier contains a timing side channel in ECDSA signature generation. This allows a local or remote attacker able to measure the duration of hundreds to thousands of signing operations to compute the private key used. The issue occurs because scalar multiplication in ecp.cpp (prime field curves small leakage) and algebra.cpp (binary field curves large leakage) is not constant time and leaks the bit length of the scalar among other information.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00066.html http://www.openwall.com/lists/oss-security/2019/10/02/2 https://eprint.iacr.org/2011/232.pdf https://github.com/weidai11/cryptopp/issues/869 https://minerva.crocs.fi.muni.cz/ https://tches.iacr.org/index.php/TCHES/article/view/7337

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.9