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Vulnerability record · CVE-2002-0639 · published 3 July 2002

CVE-2002-0639: Openbsd openssh integer overflow vulnerability

Openbsd · Openssh

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.

9.8 CVSS 3.1 Critical EPSS 18% · top 2.9% CWE-190 · Integer overflow
9.8CVSS 3.1 base score, v2 10.0
18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
34References, 6 tagged exploit
16 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-030.0.txt Broken Link
http://archives.neohapsis.com/archives/bugtraq/2002-06/0335.html Broken Link
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000502 Broken Link
http://marc.info/?l=bugtraq&m=102514371522793&w=2 ExploitMailing List
http://marc.info/?l=bugtraq&m=102514631524575&w=2 ExploitMailing List
http://marc.info/?l=bugtraq&m=102521542826833&w=2 ExploitMailing List
http://www.cert.org/advisories/CA-2002-18.html Third Party AdvisoryUS Government Resource
http://www.debian.org/security/2002/dsa-134 Broken Link
http://www.iss.net/security_center/static/9169.php Broken Link
http://www.kb.cert.org/vuls/id/369347 Third Party AdvisoryUS Government Resource
http://www.linuxsecurity.com/advisories/other_advisory-2177.html Broken Link
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2002:040 Broken Link
http://www.osvdb.org/6245 Broken Link
http://www.securityfocus.com/bid/5093 Broken LinkThird Party AdvisoryVDB Entry
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX0206-195 Broken Link
https://twitter.com/RooneyMcNibNug/status/1152332585349111810 Broken Link
https://web.archive.org/web/20080622172542/www.iss.net/threats/advise123.html Third Party Advisory
ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-030.0.txt Broken Link
http://archives.neohapsis.com/archives/bugtraq/2002-06/0335.html Broken Link
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000502 Broken Link
http://marc.info/?l=bugtraq&m=102514371522793&w=2 ExploitMailing List
http://marc.info/?l=bugtraq&m=102514631524575&w=2 ExploitMailing List
http://marc.info/?l=bugtraq&m=102521542826833&w=2 ExploitMailing List
http://www.cert.org/advisories/CA-2002-18.html Third Party AdvisoryUS Government Resource
http://www.debian.org/security/2002/dsa-134 Broken Link
http://www.iss.net/security_center/static/9169.php Broken Link
http://www.kb.cert.org/vuls/id/369347 Third Party AdvisoryUS Government Resource
http://www.linuxsecurity.com/advisories/other_advisory-2177.html Broken Link
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2002:040 Broken Link
http://www.osvdb.org/6245 Broken Link
http://www.securityfocus.com/bid/5093 Broken LinkThird Party AdvisoryVDB Entry
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX0206-195 Broken Link
https://twitter.com/RooneyMcNibNug/status/1152332585349111810 Broken Link
https://web.archive.org/web/20080622172542/www.iss.net/threats/advise123.html Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2002-0639), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.