Cisco IOS 12.4 SSH Server denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS 12.4 and classified as problematic. The impacted element is an unknown function of the component SSH Server. The manipulation results in denial of service. This vulnerability is cataloged as CVE-2008-1159. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS 12.4 (Router Operating System). It has been classified as problematic. Affected is an unknown code of the component SSH Server. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

Multiple unspecified vulnerabilities in the SSH server in Cisco IOS 12.4 allow remote attackers to cause a denial of service (device restart) via unknown vectors, aka Bug ID (1) CSCsk42419, (2) CSCsk60020, and (3) CSCsh51293.

The bug was discovered 05/21/2008. The weakness was shared 05/22/2008 with Cisco (Website). The advisory is available at cisco.com. This vulnerability is traded as CVE-2008-1159 since 03/05/2008. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 49015 (Cisco IOS Secure Shell Denial of Service Vulnerabilities - Cisco Systems), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43137 (Cisco IOS Secure Shell Denial of Service Vulnerabilities (cisco-sa-20080521-ssh)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (42563), Tenable (49015), SecurityFocus (BID 29314†), OSVDB (45676†) and Secunia (SA30322†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 49015
Nessus Name: Cisco IOS Secure Shell Denial of Service Vulnerabilities - Cisco Systems
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/05/2008 🔍
05/21/2008 +77 days 🔍
05/21/2008 +0 days 🔍
05/21/2008 +0 days 🔍
05/21/2008 +0 days 🔍
05/21/2008 +0 days 🔍
05/22/2008 +1 days 🔍
05/22/2008 +0 days 🔍
05/22/2008 +0 days 🔍
05/27/2008 +5 days 🔍
06/19/2008 +22 days 🔍
09/01/2010 +804 days 🔍
06/01/2025 +5387 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Organization: Cisco
Status: Confirmed

CVE: CVE-2008-1159 (🔍)
GCVE (CVE): GCVE-0-2008-1159
GCVE (VulDB): GCVE-100-3714

OVAL: 🔍

X-Force: 42563 - Cisco IOS SSH multiple denial of service, Medium Risk
SecurityFocus: 29314 - Cisco IOS SSH Multiple Denial of Service Vulnerabilities
Secunia: 30322 - Cisco IOS SSH Server Denial of Service, Moderately Critical
OSVDB: 45676 - Cisco IOS SSH Server Unspecified Remote DoS (CSCsh51293)
SecurityTracker: 1020073
Vulnerability Center: 18438 - [cisco-sa-20080521-ssh] Cisco IOS SSH Vulnerability Cause DoS and Spurious Memory Access Errors, High
Vupen: ADV-2008-1605

Entryinfo

Created: 06/19/2008 12:34
Updated: 06/01/2025 06:30
Changes: 06/19/2008 12:34 (91), 08/10/2019 15:22 (1), 06/01/2025 06:30 (18)
Complete: 🔍
Cache ID: 216:F1C:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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