CVE-2019-14318

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-07-30 · updated 2026-06-17
Weakness: CWE-417

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.

Affected products

Cryptopp Crypto++: through 8.3.0

References

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
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

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