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5.1	$0-$5k	0.00

A vulnerability, which was classified as problematic, was found in Cisco IOS 15.4/15.5/15.6 (Router Operating System). This affects some unknown processing of the component IKEv1 State Machine. The manipulation with an unknown input leads to a data processing vulnerability. CWE is classifying the issue as CWE-19. This is going to have an impact on availability. The summary by CVE is:

The IKEv1 state machine in Cisco IOS 15.4 through 15.6 and IOS XE 3.15 through 3.17 allows remote attackers to cause a denial of service (IPsec connection termination) via a crafted IKEv1 packet to a tunnel endpoint, aka Bug ID CSCuw08236.

The weakness was shared 12/19/2015 as CSCuw08236 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is uniquely identified as CVE-2015-6429 since 08/17/2015. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 87820 (Cisco IOS Software IKEv1 State Machine DoS (CSCuw08236)), 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.

Applying a patch is able to eliminate this problem. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (87820).

Affected

• Cisco IOS 15.4/15.5/15.6
• Cisco IOS XE 3.15/3.16/3.17

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS

Version

• 15.4
• 15.5
• 15.6

License

• commercial

Support

• end of life (old version)

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Data processing
CWE: CWE-19
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 87820
Nessus Name: Cisco IOS Software IKEv1 State Machine DoS (CSCuw08236)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103403
OpenVAS Name: Cisco IOS and IOS XE Software IKEv1 State Machine Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/17/2015 🔍
12/18/2015 +123 days 🔍
12/18/2015 +0 days 🔍
12/19/2015 +1 days 🔍
12/19/2015 +0 days 🔍
12/20/2015 +1 days 🔍
12/22/2015 +2 days 🔍
01/08/2016 +17 days 🔍
07/01/2022 +2366 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCuw08236
Status: Confirmed

CVE: CVE-2015-6429 (🔍)
OVAL: 🔍

SecurityTracker: 1034505
Vulnerability Center: 55338 - [cisco-sa-20151218-ios] Cisco IOS, IOS XE Remote DoS in IKEv1 State Machine, Medium
SecurityFocus: 79745

Entryinfo

Created: 12/22/2015 10:16
Updated: 07/01/2022 13:18
Changes: 12/22/2015 10:16 (49), 06/19/2018 21:01 (23), 07/01/2022 13:18 (2)
Complete: 🔍

Discussion

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