OpenSSH 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
Published Mar 7, 2006
5.0
MEDIUMCVSS 2.0
EPSS 1.92%
Description
OpenSSH 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.
Affected products
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of OpenSSH as distributed with Red Hat Enterprise Linux 2.1, 3, or 4.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.92% (0.01920) | 79.16th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.88% (0.01875) | 76.60th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.90% (0.01901) | 82.03th | v4 (v2025.03.14) |
| Feb 11, 2025 | 2.23% (0.02230) | 89.36th | v3 (v2023.03.01) |
| Sep 16, 2023 | 4.50% (0.04500) | 91.50th | v3 (v2023.03.01) |
| May 2, 2023 | 6.24% (0.06236) | 92.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 6.98% (0.06985) | 92.85th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
References (11)
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:09.openssh.asc vendor-advisoryx_refsource_FREEBSD
- http://bugzilla.mindrot.org/show_bug.cgi?id=839 x_refsource_CONFIRM
- http://securityreason.com/securityalert/520 third-party-advisoryx_refsource_SREASON
- http://securitytracker.com/id?1015706 vdb-entryx_refsource_SECTRACKPatch
- http://www.osvdb.org/23797 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/16892 vdb-entryx_refsource_BIDPatch
- http://www.vupen.com/english/advisories/2006/0805 vdb-entryx_refsource_VUPENVendor Advisory
- https://access.redhat.com/security/cve/CVE-2006-0883 Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/25116 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2006-0883
- https://www.cve.org/CVERecord?id=CVE-2006-0883
| Link | Providers | Tags |
|---|---|---|
| ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:09.openssh.asc | vendor-advisoryx_refsource_FREEBSD | |
| http://bugzilla.mindrot.org/show_bug.cgi?id=839 | x_refsource_CONFIRM | |
| http://securityreason.com/securityalert/520 | third-party-advisoryx_refsource_SREASON | |
| http://securitytracker.com/id?1015706 | vdb-entryx_refsource_SECTRACKPatch | |
| http://www.osvdb.org/23797 | vdb-entryx_refsource_OSVDB | |
| http://www.securityfocus.com/bid/16892 | vdb-entryx_refsource_BIDPatch | |
| http://www.vupen.com/english/advisories/2006/0805 | vdb-entryx_refsource_VUPENVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2006-0883 | Vendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/25116 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2006-0883 | ||
| https://www.cve.org/CVERecord?id=CVE-2006-0883 |
Change history (0)
No recorded changes yet.