Cisco IOS 15.1(4)M3 on 1800 ISDN Basic Rate Interface resource management

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4$5k-$25k0.00

A vulnerability has been found in Cisco IOS 15.1(4)M3 on 1800 (Router Operating System) and classified as problematic. Affected by this vulnerability is some unknown processing of the component ISDN Basic Rate Interface. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability.

The weakness was presented 08/27/2014 with Cisco as CSCul77897 as confirmed security notice (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2014-3347 since 05/07/2014. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/11/2022). The advisory points out:

Cisco 1800 Series Integrated Services Routers (ISR) contain a vulnerability in the hardware entropy collection module when the Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) is configured and connected to a public switched network. This could allow an attacker with knowledge of the ISDN phone number of the affected device to trigger a denial of service (DoS) condition. The vulnerability is due to an interrupt timer collision that causes the hardware encryption module to enter a corrupted state, causing the device to become unresponsive. An attacker would need to perform the attack exactly when the device polls the hardware encryption module to perform entropy collection.

The problem might be mitigated by replacing the product with as an alternative. The security notice contains the following remark:

The affected devices have reached the End of Software Maintenance milestone. Fixed software will not be released.

The vulnerability is also documented in the vulnerability database at X-Force (95558). Additional details are provided at tools.cisco.com.

Productinfo

Type

Vendor

Name

Version

License

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: 5.9
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.9
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Alternative
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/07/2014 🔍
08/27/2014 +112 days 🔍
08/27/2014 +0 days 🔍
08/27/2014 +0 days 🔍
08/28/2014 +1 days 🔍
08/28/2014 +0 days 🔍
08/28/2014 +0 days 🔍
08/29/2014 +1 days 🔍
02/11/2022 +2723 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCul77897
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3347 (🔍)
X-Force: 95558 - Cisco 1800 Series Integrated Services Routers collection module denial of service, Medium Risk
SecurityTracker: 1030772 - Cisco 1800 Series Integrated Services Router ISDN Timing Error Lets Remote Users Deny Services
Vulnerability Center: 45957 - Cisco IOS 15.1(4)M2 on 1800 Series ISR Remote DoS via ISDN Phone Number, Medium
SecurityFocus: 69439 - Cisco 1800 Series CVE-2014-3347 Denial of Service Vulnerability

Misc.: 🔍

Entryinfo

Created: 08/29/2014 10:11
Updated: 02/11/2022 07:29
Changes: 08/29/2014 10:11 (74), 06/05/2017 10:41 (1), 02/11/2022 07:29 (3)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!