A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts
Published Sep 17, 2008
5.0
MEDIUMCVSS 2.0
EPSS 28.39%
Description
A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.
Affected products
No data.
Configuration 1
- ≤ 4.3p2
- 1.2
- 1.2.1
- 1.2.2
- 1.2.3
- 1.2.27
- 1.3
- 1.5
- 1.5.7
- 1.5.8
- 2
- 2.1
- 2.1.1
- 2.2
- 2.3
- 2.3.1
- 2.5
- 2.5.1
- 2.5.2
- 2.9
- 2.9.9
- 2.9.9p2
- 2.9p1
- 2.9p2
- 3.0
- 3.0.1
- 3.0.1p1
- 3.0.2
- 3.0.2p1
- 3.0p1
- 3.1
- 3.1p1
- 3.2
- 3.2.2
- 3.2.2p1
- 3.2.3p1
- 3.3
- 3.3p1
- 3.4
- 3.4p1
- 3.5
- 3.5p1
- 3.6
- 3.6.1
- 3.6.1p1
- 3.6.1p2
- 3.7
- 3.7.1
- 3.7.1p1
- 3.7.1p2
- 3.8
- 3.8.1
- 3.8.1p1
- 3.9
- 3.9.1
- 3.9.1p1
- 4.0
- 4.0p1
- 4.1
- 4.1p1
- 4.2
- 4.2p1
- 4.3
- 4.3p1
Configuration 2
- ≤ 4.6
- 1.2
- 1.2.1
- 1.2.2
- 1.2.3
- 1.2.27
- 1.3
- 1.5
- 1.5.7
- 1.5.8
- 2
- 2.1
- 2.1.1
- 2.2
- 2.3
- 2.3.1
- 2.5
- 2.5.1
- 2.5.2
- 2.9
- 2.9.9
- 2.9.9p2
- 2.9p1
- 2.9p2
- 3.0
- 3.0.1
- 3.0.1p1
- 3.0.2
- 3.0.2p1
- 3.0p1
- 3.1
- 3.1p1
- 3.2
- 3.2.2
- 3.2.2p1
- 3.2.3p1
- 3.3
- 3.3p1
- 3.4
- 3.4p1
- 3.5
- 3.5p1
- 3.6
- 3.6.1
- 3.6.1p1
- 3.6.1p2
- 3.7
- 3.7.1
- 3.7.1p1
- 3.7.1p2
- 3.8
- 3.8.1
- 3.8.1p1
- 3.9
- 3.9.1
- 3.9.1p1
- 4.0
- 4.0p1
- 4.1
- 4.1p1
- 4.2
- 4.2p1
- 4.3
- 4.3p1
- 4.3p2
- 4.4
- 4.4p1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. The patch used to fix CVE-2006-5051 in Red Hat Enterprise Linux 2.1, 3, 4, and 5 was complete and does not suffer from this problem.
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.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Jul 24, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 28.39% (0.28392) | 98.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 28.60% (0.28601) | 97.88th | v5 (v2026.06.15) |
| Mar 27, 2025 | 1.57% (0.01573) | 79.33th | v4 (v2025.03.14) |
| Mar 20, 2025 | 3.95% (0.03953) | 87.37th | v4 (v2025.03.14) |
| Mar 19, 2025 | 1.57% (0.01573) | 79.52th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.95% (0.03953) | 87.58th | v4 (v2025.03.14) |
| Dec 12, 2024 | 7.61% (0.07613) | 94.43th | v3 (v2023.03.01) |
| Jul 2, 2024 | 7.61% (0.07613) | 94.19th | v3 (v2023.03.01) |
| Jan 15, 2024 | 4.48% (0.04479) | 91.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.16% (0.04162) | 90.86th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
References (13)
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678
- http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html vendor-advisory
- http://secunia.com/advisories/31885 third-party-advisory
- http://secunia.com/advisories/32080 third-party-advisory
- http://secunia.com/advisories/32181 third-party-advisory
- http://www.debian.org/security/2008/dsa-1638 vendor-advisoryPatch
- http://www.openwall.com/lists/oss-security/2024/07/01/3 mailing-list
- http://www.securitytracker.com/id?1020891 vdb-entry
- http://www.ubuntu.com/usn/usn-649-1 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2008-4109 Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45202 vdb-entry
- https://nvd.nist.gov/vuln/detail/CVE-2008-4109
- https://www.cve.org/CVERecord?id=CVE-2008-4109
| Link | Providers | Tags |
|---|---|---|
| http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498678 | ||
| http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00004.html | vendor-advisory | |
| http://secunia.com/advisories/31885 | third-party-advisory | |
| http://secunia.com/advisories/32080 | third-party-advisory | |
| http://secunia.com/advisories/32181 | third-party-advisory | |
| http://www.debian.org/security/2008/dsa-1638 | vendor-advisoryPatch | |
| http://www.openwall.com/lists/oss-security/2024/07/01/3 | mailing-list | |
| http://www.securitytracker.com/id?1020891 | vdb-entry | |
| http://www.ubuntu.com/usn/usn-649-1 | vendor-advisory | |
| https://access.redhat.com/security/cve/CVE-2008-4109 | Vendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/45202 | vdb-entry | |
| https://nvd.nist.gov/vuln/detail/CVE-2008-4109 | ||
| https://www.cve.org/CVERecord?id=CVE-2008-4109 |
Change history (0)
No recorded changes yet.