Cisco IOS 15.5(3)M on CUBE SIP resource management

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as problematic, has been found in Cisco IOS 15.5(3)M on CUBE (Router Operating System). Affected by this issue is an unknown functionality of the component SIP Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

The SIP implementation in Cisco IOS 15.5(3)M on Cisco Unified Border Element (CUBE) devices allows remote attackers to cause a denial of service via crafted SIP messages, aka Bug ID CSCuv79202.

The weakness was presented 10/31/2015 as CSCuv79202 as confirmed advisory (Website). The advisory is shared for download at This vulnerability is handled as CVE-2015-6343 since 08/17/2015. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 03/01/2018).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Vulnerability Center (SBV-53992).






  • commercial

CPE 2.3info

CPE 2.2info


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

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



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

NVD Base Score: 🔍


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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

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


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


08/17/2015 🔍
10/26/2015 +70 days 🔍
10/27/2015 +1 days 🔍
10/31/2015 +4 days 🔍
10/31/2015 +0 days 🔍
11/02/2015 +2 days 🔍
03/01/2018 +850 days 🔍



Advisory: CSCuv79202
Status: Confirmed

CVE: CVE-2015-6343 (🔍)
Vulnerability Center: 53992 - [cisco-sa-20151026-cube] Cisco IOS 15.5(3)M on Cisco Unified Border Element Remote DoS in SIP, High
SecurityFocus: 77308


Created: 11/02/2015 10:02 AM
Updated: 03/01/2018 10:21 AM
Changes: 11/02/2015 10:02 AM (51), 03/01/2018 10:21 AM (7)
Complete: 🔍


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