A side-channel issue was discovered in Botan before 2.9.0. An attacker capable of precisely measuring the time taken for ECC key generation may be able to derive information about the high bits of the secret key, as the function to derive the public point from the secret scalar uses an unblinded Montgomery ladder whose loop iteration count depends on the bitlength of the secret. This issue affects only key generation, not ECDSA signatures or ECDH key agreement.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-03-08T19:00:00

Updated: 2024-08-05T11:58:18.213Z

Reserved: 2018-12-17T00:00:00

Link: CVE-2018-20187

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-03-08T19:29:00.250

Modified: 2024-11-21T04:01:02.913

Link: CVE-2018-20187

cve-icon Redhat

No data.