Cisco IOS XE up to 3.7S.1 Packet Processor IP Fragment MPLS input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS XE up to 3.7S.1. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component Packet Processor. The manipulation as part of IP Fragment leads to input validation (MPLS). This vulnerability is uniquely identified as CVE-2013-6981. Moreover, an exploit is present. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Cisco IOS XE up to 3.7S.1 (Router Operating System). It has been rated as critical. This issue affects an unknown function of the component Packet Processor. The manipulation as part of a IP Fragment leads to a input validation vulnerability (MPLS). Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

Cisco IOS XE 3.7S(.1) and earlier allows remote attackers to cause a denial of service (Packet Processor crash) via fragmented MPLS IP packets, aka Bug ID CSCul00709.

The weakness was disclosed 12/24/2013 with Cisco as CSCul00709 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2013-6981 since 12/05/2013. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a private exploit is available. The advisory points out:

An attacker could exploit this vulnerability by injecting specifically crafted MPLS IP packets that are subject to MPLS fragmentation.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 79146 (Cisco IOS XE Crafted MPLS IP Fragmentation DoS (CSCul00709)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO.

Upgrading to version CSCul00709 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (79146), SecurityFocus (BID 64514†), OSVDB (101423†), Secunia (SA56206†) and Vulnerability Center (SBV-42715†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: MPLS
Class: Input validation / MPLS
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 79146
Nessus Name: Cisco IOS XE Crafted MPLS IP Fragmentation DoS (CSCul00709)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: IOS XE CSCul00709

Timelineinfo

12/05/2013 🔍
12/24/2013 +19 days 🔍
12/24/2013 +0 days 🔍
12/24/2013 +0 days 🔍
12/25/2013 +1 days 🔍
12/26/2013 +1 days 🔍
12/27/2013 +1 days 🔍
12/27/2013 +0 days 🔍
11/12/2014 +320 days 🔍
06/04/2021 +2396 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCul00709
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-6981 (🔍)
GCVE (CVE): GCVE-0-2013-6981
GCVE (VulDB): GCVE-100-11627
SecurityFocus: 64514
Secunia: 56206 - Cisco IOS XE MPLS IP Fragmentation Denial of Service Vulnerability, Less Critical
OSVDB: 101423
SecurityTracker: 1029538
Vulnerability Center: 42715 - Cisco IOS XE Remote DoS Vulnerability via Crafted MPLS Packets, Medium

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

Entryinfo

Created: 12/27/2013 18:11
Updated: 06/04/2021 16:54
Changes: 12/27/2013 18:11 (78), 05/18/2017 17:23 (1), 06/04/2021 16:46 (3), 06/04/2021 16:54 (1)
Complete: 🔍
Cache ID: 216::103

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