CVE-2008-4109
Summary
| CVE | CVE-2008-4109 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2008-09-18 15:04:27 UTC |
| Updated | 2026-04-23 00:35:47 UTC |
| 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. |
Risk And Classification
Primary CVSS: v2.0 5 from [email protected]
AV:N/AC:L/Au:N/C:N/I:N/A:P
Problem Types: CWE-264 | NVD-CWE-noinfo | n/a
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Debian | Linux | unknown | unknown | etch | All |
| Application | Debian | Linux | unknown | unknown | sid | All |
| Application | Openbsd | Openssh | 1.2 | All | All | All |
| Application | Openbsd | Openssh | 1.2.1 | All | All | All |
| Application | Openbsd | Openssh | 1.2.2 | All | All | All |
| Application | Openbsd | Openssh | 1.2.27 | All | All | All |
| Application | Openbsd | Openssh | 1.2.3 | All | All | All |
| Application | Openbsd | Openssh | 1.3 | All | All | All |
| Application | Openbsd | Openssh | 1.5 | All | All | All |
| Application | Openbsd | Openssh | 1.5.7 | All | All | All |
| Application | Openbsd | Openssh | 1.5.8 | All | All | All |
| Application | Openbsd | Openssh | 2 | All | All | All |
| Application | Openbsd | Openssh | 2.1 | All | All | All |
| Application | Openbsd | Openssh | 2.1.1 | All | All | All |
| Application | Openbsd | Openssh | 2.2 | All | All | All |
| Application | Openbsd | Openssh | 2.3 | All | All | All |
| Application | Openbsd | Openssh | 2.3.1 | All | All | All |
| Application | Openbsd | Openssh | 2.5 | All | All | All |
| Application | Openbsd | Openssh | 2.5.1 | All | All | All |
| Application | Openbsd | Openssh | 2.5.2 | All | All | All |
| Application | Openbsd | Openssh | 2.9 | All | All | All |
| Application | Openbsd | Openssh | 2.9.9 | All | All | All |
| Application | Openbsd | Openssh | 2.9.9p2 | All | All | All |
| Application | Openbsd | Openssh | 2.9p1 | All | All | All |
| Application | Openbsd | Openssh | 2.9p2 | All | All | All |
| Application | Openbsd | Openssh | 3.0 | All | All | All |
| Application | Openbsd | Openssh | 3.0.1 | All | All | All |
| Application | Openbsd | Openssh | 3.0.1p1 | All | All | All |
| Application | Openbsd | Openssh | 3.0.2 | All | All | All |
| Application | Openbsd | Openssh | 3.0.2p1 | All | All | All |
| Application | Openbsd | Openssh | 3.0p1 | All | All | All |
| Application | Openbsd | Openssh | 3.1 | All | All | All |
| Application | Openbsd | Openssh | 3.1p1 | All | All | All |
| Application | Openbsd | Openssh | 3.2 | All | All | All |
| Application | Openbsd | Openssh | 3.2.2 | All | All | All |
| Application | Openbsd | Openssh | 3.2.2p1 | All | All | All |
| Application | Openbsd | Openssh | 3.2.3p1 | All | All | All |
| Application | Openbsd | Openssh | 3.3 | All | All | All |
| Application | Openbsd | Openssh | 3.3p1 | All | All | All |
| Application | Openbsd | Openssh | 3.4 | All | All | All |
| Application | Openbsd | Openssh | 3.4p1 | All | All | All |
| Application | Openbsd | Openssh | 3.5 | All | All | All |
| Application | Openbsd | Openssh | 3.5p1 | All | All | All |
| Application | Openbsd | Openssh | 3.6 | All | All | All |
| Application | Openbsd | Openssh | 3.6.1 | All | All | All |
| Application | Openbsd | Openssh | 3.6.1p1 | All | All | All |
| Application | Openbsd | Openssh | 3.6.1p2 | All | All | All |
| Application | Openbsd | Openssh | 3.7 | All | All | All |
| Application | Openbsd | Openssh | 3.7.1 | All | All | All |
| Application | Openbsd | Openssh | 3.7.1p1 | All | All | All |
| Application | Openbsd | Openssh | 3.7.1p2 | All | All | All |
| Application | Openbsd | Openssh | 3.8 | All | All | All |
| Application | Openbsd | Openssh | 3.8.1 | All | All | All |
| Application | Openbsd | Openssh | 3.8.1p1 | All | All | All |
| Application | Openbsd | Openssh | 3.9 | All | All | All |
| Application | Openbsd | Openssh | 3.9.1 | All | All | All |
| Application | Openbsd | Openssh | 3.9.1p1 | All | All | All |
| Application | Openbsd | Openssh | 4.0 | All | All | All |
| Application | Openbsd | Openssh | 4.0p1 | All | All | All |
| Application | Openbsd | Openssh | 4.1 | All | All | All |
| Application | Openbsd | Openssh | 4.1p1 | All | All | All |
| Application | Openbsd | Openssh | 4.2 | All | All | All |
| Application | Openbsd | Openssh | 4.2p1 | All | All | All |
| Application | Openbsd | Openssh | 4.3 | All | All | All |
| Application | Openbsd | Openssh | 4.3p1 | All | All | All |
| Application | Openbsd | Openssh | All | All | All | All |
| Application | Openbsd | Openssh | All | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.openwall.com/lists/oss-security/2024/07/01/3 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | |
| SUSE update for openssh - Secunia Advisories - Vulnerability Intelligence - Secunia.com | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| Security Advisory SA32080 - Ubuntu update for openssh-server - Secunia | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| OpenSSH on Debian Lets Remote Users Prevent Logins - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| USN-649-1: OpenSSH vulnerabilities | Ubuntu | af854a3a-2127-422b-91ae-364da2661108 | www.ubuntu.com | |
| #498678 - sigdie must not be called from a signal handler context - Debian Bug report logs | af854a3a-2127-422b-91ae-364da2661108 | bugs.debian.org | |
| [security-announce] SUSE Security Summary Report: SUSE-SR:2008:020 | af854a3a-2127-422b-91ae-364da2661108 | lists.opensuse.org | |
| Debian -- Security Information -- DSA-1638-1 openssh | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | Patch |
| IBM X-Force Exchange | af854a3a-2127-422b-91ae-364da2661108 | exchange.xforce.ibmcloud.com | |
| Debian update for openssh - Secunia Advisories - Vulnerability Intelligence - Secunia.com | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
| Organization | Published | Contributor | Statement |
|---|---|---|---|
| Red Hat | 2017-08-07 | Joshua Bressers | 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. |
There are currently no legacy QID mappings associated with this CVE.