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Case File

CVE-2018-20187

MEDIUM · CVSS 5.9 EPSS 1.52% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2019-03-08 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.9. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2018-20187
Severity
MEDIUM
CVSS
5.9
EPSS
1.52%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)