CVE-2019-14318
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.
Does this matter?
Lower severity and a low EPSS score (3.10%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 3.10% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-417
- Affected
- cryptopp/crypto\+\+
- Source
- cve@mitre.org
EPSS 3.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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.pdfExploit, Third Party Advisory
- https://github.com/weidai11/cryptopp/issues/869Patch, Third Party Advisory
- https://minerva.crocs.fi.muni.cz/
- https://tches.iacr.org/index.php/TCHES/article/view/7337Third Party Advisory
- 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.pdfExploit, Third Party Advisory
- https://github.com/weidai11/cryptopp/issues/869Patch, Third Party Advisory
- https://minerva.crocs.fi.muni.cz/
- https://tches.iacr.org/index.php/TCHES/article/view/7337Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.