National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-20187 Detail

Current Description

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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 5.9 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://botan.randombit.net/news.html Release Notes Vendor Advisory
https://botan.randombit.net/security.html Vendor Advisory
https://github.com/crocs-muni/ECTester Not Applicable Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-320 Key Management Errors NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.9.0


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-20187
NVD Published Date:
03/08/2019
NVD Last Modified:
03/12/2019