CVE-2002-0639

9.8
CRITICALCVSS v3.1 Base Score
18.29%
LOW RiskEPSS (97th percentile)

Integer overflow in sshd in OpenSSH 2.9.9 through 3.3 allows remote attackers to execute arbitrary code during challenge response authentication (ChallengeResponseAuthentication) when OpenSSH is using SKEY or BSD_AUTH authentication.

Published: 7/3/2002
Modified: 6/16/2026
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Vulnerability Summary

CVSS v3 Score

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2 Score

10

AV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS Score (Exploitation Probability)

18.29%LOW Exploitation Risk
97th percentile

This vulnerability has a 18.29% probability of being exploited in the next 30 days, ranking higher than 97% of all scored CVEs.

CWE Classification

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