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    CVE-2002-0639

    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:Jul 3, 2002
    Last Modified:Apr 16, 2026
    EPS:Apr 2, 2003
    EPSS Score:0.36717
    CVSS Score:9.8

    Affected Products

    Vendor
    Openbsd
    Product
    Openssh

    Exploits

    http://marc.info/?l=bugtraq&m=102514371522793&w=2http://marc.info/?l=bugtraq&m=102514631524575&w=2http://marc.info/?l=bugtraq&m=102521542826833&w=2http://marc.info/?l=bugtraq&m=102514371522793&w=2http://marc.info/?l=bugtraq&m=102514631524575&w=2http://marc.info/?l=bugtraq&m=102521542826833&w=2

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-73283 (CVSS 2.5) — In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tun…
    CVE-2026-73282 (CVSS 4.8) — In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forward…
    CVE-2026-73281 (CVSS 3.5) — In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locall…
    CVE-2026-60002 (CVSS 7.7) — ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchan…
    CVE-2026-60001 (CVSS 6.5) — sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.…
    CVE-2026-60000 (CVSS 3.7) — sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from ex…
    CVE-2026-59999 (CVSS 5.9) — In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, b…
    CVE-2026-59998 (CVSS 4.8) — sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no v…
    CVE-2026-59997 (CVSS 4.2) — internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be …
    CVE-2026-59996 (CVSS 4.2) — scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occ…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High