Vulnerability Monitor

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CVE-2002-0640

Buffer overflow in sshd in OpenSSH 2.3.1 through 3.3 may allow remote attackers to execute arbitrary code via a large number of responses during challenge response authentication when OpenBSD is using PAM modules with interactive keyboard authentication (PAMAuthenticationViaKbdInt).

Security Impact Summary

CVE-2002-0640 is a security vulnerability that . Impacting 1 product from openbsd organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2002, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2002-07-03T04:00:00.000

Last Modified

2025-04-03T01:03:51.193

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 10.0 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

10.0

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openbsd	openssh	1.2.2	Yes
Application	openbsd	openssh	1.2.3	Yes
Application	openbsd	openssh	2.1	Yes
Application	openbsd	openssh	2.1.1	Yes
Application	openbsd	openssh	2.2	Yes
Application	openbsd	openssh	2.3	Yes
Application	openbsd	openssh	2.5	Yes
Application	openbsd	openssh	2.5.1	Yes
Application	openbsd	openssh	2.5.2	Yes
Application	openbsd	openssh	2.9	Yes
Application	openbsd	openssh	2.9.9	Yes
Application	openbsd	openssh	2.9p1	Yes
Application	openbsd	openssh	2.9p2	Yes
Application	openbsd	openssh	3.0	Yes
Application	openbsd	openssh	3.0.1	Yes
Application	openbsd	openssh	3.0.1p1	Yes
Application	openbsd	openssh	3.0.2	Yes
Application	openbsd	openssh	3.0.2p1	Yes
Application	openbsd	openssh	3.0p1	Yes
Application	openbsd	openssh	3.1	Yes
Application	openbsd	openssh	3.1p1	Yes
Application	openbsd	openssh	3.2	Yes
Application	openbsd	openssh	3.2.2p1	Yes
Application	openbsd	openssh	3.2.3p1	Yes
Application	openbsd	openssh	3.3	Yes
Application	openbsd	openssh	3.3p1	Yes

References

ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-030.0.txt ([email protected])
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000502 ([email protected])
http://marc.info/?l=bugtraq&m=102514371522793&w=2 ([email protected])
http://marc.info/?l=bugtraq&m=102514631524575&w=2 ([email protected])
http://marc.info/?l=bugtraq&m=102521542826833&w=2 ([email protected])
http://marc.info/?l=bugtraq&m=102532054613894&w=2 ([email protected])
http://www.cert.org/advisories/CA-2002-18.html US Government Resource ([email protected])
http://www.debian.org/security/2002/dsa-134 ([email protected])
http://www.kb.cert.org/vuls/id/369347 US Government Resource ([email protected])
http://www.linuxsecurity.com/advisories/other_advisory-2177.html ([email protected])
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2002:040 ([email protected])
http://www.novell.com/linux/security/advisories/2002_024_openssh_txt.html ([email protected])
http://www.openwall.com/lists/oss-security/2024/07/01/3 ([email protected])
http://www.osvdb.org/839 ([email protected])
http://www.redhat.com/support/errata/RHSA-2002-127.html ([email protected])
http://www.redhat.com/support/errata/RHSA-2002-131.html ([email protected])
http://www.securityfocus.com/bid/5093 ([email protected])
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX0206-195 ([email protected])
ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-030.0.txt (af854a3a-2127-422b-91ae-364da2661108)
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000502 (af854a3a-2127-422b-91ae-364da2661108)
http://marc.info/?l=bugtraq&m=102514371522793&w=2 (af854a3a-2127-422b-91ae-364da2661108)
http://marc.info/?l=bugtraq&m=102514631524575&w=2 (af854a3a-2127-422b-91ae-364da2661108)
http://marc.info/?l=bugtraq&m=102521542826833&w=2 (af854a3a-2127-422b-91ae-364da2661108)
http://marc.info/?l=bugtraq&m=102532054613894&w=2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.cert.org/advisories/CA-2002-18.html US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2002/dsa-134 (af854a3a-2127-422b-91ae-364da2661108)
http://www.kb.cert.org/vuls/id/369347 US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
http://www.linuxsecurity.com/advisories/other_advisory-2177.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2002:040 (af854a3a-2127-422b-91ae-364da2661108)
http://www.novell.com/linux/security/advisories/2002_024_openssh_txt.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2024/07/01/3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.osvdb.org/839 (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2002-127.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2002-131.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/5093 (af854a3a-2127-422b-91ae-364da2661108)
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX0206-195 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For openbsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.