CVE-2006-0883

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Summary

CVECVE-2006-0883
StatePUBLISHED
Assignerfreebsd
Source PriorityCVE Program / NVD first with legacy fallback
Published2006-03-07 02:02:00 UTC
Updated2025-04-03 01:03:51 UTC
DescriptionOpenSSH on FreeBSD 5.3 and 5.4, when used with OpenPAM, does not properly handle when a forked child process terminates during PAM authentication, which allows remote attackers to cause a denial of service (client connection refusal) by connecting multiple times to the SSH server, waiting for the password prompt, then disconnecting.

Risk And Classification

Primary CVSS: v2.0 5 from [email protected]

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

EPSS: 0.019740000 probability, percentile 0.835840000 (date 2026-04-16)

Problem Types: CWE-399 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Freebsd Freebsd 5.3 All All All
Operating System Freebsd Freebsd 5.3 release All All
Operating System Freebsd Freebsd 5.3 releng All All
Operating System Freebsd Freebsd 5.3 stable All All
Operating System Freebsd Freebsd 5.4 pre-release All All
Operating System Freebsd Freebsd 5.4 release All All
Operating System Freebsd Freebsd 5.4 releng All All
Operating System Freebsd Freebsd 5.4 stable All All
Application Openbsd Openssh 3.8.1p1 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
SecurityTracker.com Archives - OpenSSH Interaction With OpenPAM Lets Remote Users Deny Service af854a3a-2127-422b-91ae-364da2661108 securitytracker.com Patch
OpenSSH Remote PAM Denial Of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Patch
IBM X-Force Exchange af854a3a-2127-422b-91ae-364da2661108 exchange.xforce.ibmcloud.com
www.osvdb.org/23797 af854a3a-2127-422b-91ae-364da2661108 www.osvdb.org
SecurityReason af854a3a-2127-422b-91ae-364da2661108 securityreason.com
Webmail - OVH af854a3a-2127-422b-91ae-364da2661108 www.vupen.com Vendor Advisory
Bug 839 – Privilege Separation + PAM locks users out af854a3a-2127-422b-91ae-364da2661108 bugzilla.mindrot.org
ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:09.openssh.asc af854a3a-2127-422b-91ae-364da2661108 ftp.freebsd.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

OrganizationPublishedContributorStatement
Red Hat2006-08-30Mark J CoxThis issue did not affect the versions of OpenSSH as distributed with Red Hat Enterprise Linux 2.1, 3, or 4.

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