Cisco 9900 Phone 9.3(2) RTP Hang 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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic was found in Cisco 9900 Phone 9.3(2). The impacted element is an unknown function of the component RTP Handler. Such manipulation leads to resource management (Hang). This vulnerability is referenced as CVE-2015-4226. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco 9900 Phone 9.3(2). Affected by this issue is an unknown function of the component RTP Handler. The manipulation with an unknown input leads to a resource management vulnerability (Hang). Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

The packet-storing feature on Cisco 9900 phones with firmware 9.3(2) does not properly support the RTP protocol, which allows remote attackers to cause a denial of service (device hang) by sending malformed RTP packets after a call is answered, aka Bug ID CSCur39976.

The weakness was published 06/30/2015 with Cisco as CSCur39976 as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is handled as CVE-2015-4226 since 06/04/2015. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

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 databases at SecurityFocus (BID 75471†) and Vulnerability Center (SBV-51723†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Cisco

Name

• 9900 Phone

Version

• 9.3(2)

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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: 🔍

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

Name: Hang
Class: Resource management / Hang
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/04/2015 🔍
06/29/2015 +25 days 🔍
06/29/2015 +0 days 🔍
06/30/2015 +1 days 🔍
06/30/2015 +0 days 🔍
07/01/2015 +1 days 🔍
08/03/2015 +33 days 🔍
05/22/2022 +2484 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCur39976
Organization: Cisco
Status: Confirmed

CVE: CVE-2015-4226 (🔍)
GCVE (CVE): GCVE-0-2015-4226
GCVE (VulDB): GCVE-100-76160
SecurityFocus: 75471 - Cisco Unified IP Phones 9900 Series CVE-2015-4226 Denial of Service Vulnerability
SecurityTracker: 1032748
Vulnerability Center: 51723 - Cisco Unified IP Phones 9900 Series Remote DoS via Crafted RTP Packets, Medium

Entryinfo

Created: 07/01/2015 10:24
Updated: 05/22/2022 12:21
Changes: 07/01/2015 10:24 (49), 09/10/2017 10:44 (10), 05/22/2022 12:21 (3)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

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