Cisco IOS up to 15.2 SSHv2 Authentication Username cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco IOS. The impacted element is an unknown function of the component SSHv2. The manipulation as part of Authentication Username leads to cryptographic issue. This vulnerability is traded as CVE-2012-0386. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS (Router Operating System). This issue affects some unknown functionality of the component SSHv2. The manipulation as part of a Authentication Username leads to a cryptographic issue vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is availability. The summary by CVE is:

The SSHv2 implementation in Cisco IOS 12.2, 12.4, 15.0, 15.1, and 15.2 and IOS XE 2.3.x through 2.6.x and 3.1.xS through 3.4.xS before 3.4.2S allows remote attackers to cause a denial of service (device reload) via a crafted username in a reverse SSH login attempt, aka Bug ID CSCtr49064.

The weakness was shared 03/28/2012 with Cisco as cisco-sa-20120328-ssh as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2012-0386 since 01/04/2012. The exploitation is known to be easy. The attack may be initiated remotely. A simple authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 58573 (Cisco IOS Software Reverse SSH Denial of Service Vulnerability (cisco-sa-20120328-ssh)), 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 l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43228 (Cisco IOS Software Reverse SSH Denial of Service Vulnerability (cisco-sa-20120328-ssh)).

Upgrading eliminates this vulnerability.Addressing this vulnerability is possible by firewalling tcp/22 (ssh). The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (74404), Tenable (58573), SecurityFocus (BID 52752†), OSVDB (80695†) and Secunia (SA48609†). packetstormsecurity.org is providing further details. The entries VDB-4980, VDB-4981, VDB-4982 and VDB-4983 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 58573
Nessus Name: Cisco IOS Software Reverse SSH Denial of Service Vulnerability (cisco-sa-20120328-ssh)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Firewalling: 🔍

Timelineinfo

01/04/2012 🔍
03/28/2012 +83 days 🔍
03/28/2012 +0 days 🔍
03/28/2012 +0 days 🔍
03/28/2012 +0 days 🔍
03/29/2012 +1 days 🔍
03/29/2012 +0 days 🔍
03/29/2012 +0 days 🔍
03/29/2012 +0 days 🔍
04/02/2012 +4 days 🔍
04/02/2012 +0 days 🔍
03/22/2021 +3276 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20120328-ssh
Researcher: http://www.cisco.com
Organization: Cisco
Status: Confirmed

CVE: CVE-2012-0386 (🔍)
GCVE (CVE): GCVE-0-2012-0386
GCVE (VulDB): GCVE-100-4979
X-Force: 74404 - Cisco IOS SSHv2 denial of service, Medium Risk
SecurityFocus: 52752
Secunia: 48609 - Cisco IOS Reverse SSH Login Denial of Service Vulnerability, Less Critical
OSVDB: 80695
SecurityTracker: 1026866 - Cisco IOS Reverse SSHv2 Login Flaw Lets Remote Users Deny Service
Vulnerability Center: 34746 - [cisco-sa-20120328-ssh] Cisco IOS and Cisco IOS XE SSHv2 Remote DoS Vulnerability via Reversed Login, High

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 04/02/2012 22:33
Updated: 03/22/2021 11:54
Changes: 04/02/2012 22:33 (79), 04/10/2017 12:15 (8), 03/22/2021 11:51 (4), 03/22/2021 11:54 (1)
Complete: 🔍
Cache ID: 216:A12:103

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