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.
5.7	$0-$5k	0.00

A vulnerability classified as problematic has been found in Cisco IOS XR 5.3.1 (Router Operating System). Affected is an unknown code block of the component IEEE 802.3x Flow Control Pause Frame Handler. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

Cisco IOS XR 5.3.1 on ASR 9000 devices allows remote attackers to cause a denial of service (NPU chip reset or line-card reload) by sending crafted IEEE 802.3x flow-control PAUSE frames on the local network, aka Bug ID CSCut19959.

The weakness was disclosed 06/22/2015 with Cisco as 39455 as confirmed vulnerability alert (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2015-4205 since 06/04/2015. Access to the local network is required for this attack. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability is also documented in the databases at X-Force (103967), SecurityFocus (BID 75352†) and Vulnerability Center (SBV-50667†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XR

Version

• 5.3.1

License

• commercial

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

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

Local: No
Remote: Partially

Availability: 🔍
Status: Unproven

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 🔍
06/22/2015 +18 days 🔍
06/22/2015 +0 days 🔍
06/22/2015 +0 days 🔍
06/23/2015 +1 days 🔍
06/23/2015 +0 days 🔍
06/23/2015 +0 days 🔍
05/21/2022 +2524 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: 39455
Organization: Cisco
Status: Confirmed

CVE: CVE-2015-4205 (🔍)
GCVE (CVE): GCVE-0-2015-4205
GCVE (VulDB): GCVE-100-76032
X-Force: 103967 - Cisco IOS XR Software denial of service
SecurityFocus: 75352 - Cisco IOS XR Software CVE-2015-4205 Denial of Service Vulnerability
SecurityTracker: 1032691
Vulnerability Center: 50667 - Cisco IOS-XR on ASR 9000 Routers Remote DoS via NPU Chip Reset, Medium

scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 06/23/2015 10:08 AM
Updated: 05/21/2022 02:06 PM
Changes: 06/23/2015 10:08 AM (54), 07/01/2017 08:05 AM (10), 05/21/2022 02:06 PM (3)
Complete: 🔍
Cache ID: 18:8DE:40

Discussion

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