Cisco IOS XE 5.2.0.BASE on Cisco ASR 9000 DHCPv6 input validation

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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS XE 5.2.0.BASE on Cisco ASR 9000. Impacted is an unknown function of the component DHCPv6 Handler. The manipulation results in input validation. This vulnerability is known as CVE-2014-3271. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS XE 5.2.0.BASE on Cisco ASR 9000 (Router Operating System). Affected is some unknown functionality of the component DHCPv6 Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

The DHCPv6 implementation in Cisco IOS XR allows remote attackers to cause a denial of service (device crash) via a malformed packet, aka Bug IDs CSCum85558, CSCum20949, CSCul61849, and CSCul71149.

The weakness was published 05/19/2014 with Cisco as CSCum85558 / CSCum20949 / CSCul61849 / CSCul71149 as confirmed security notice (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2014-3271 since 05/07/2014. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 76971 (Cisco IOS XR DHCPv6 Multiple DoS Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO.

Upgrading to version 5.2.0.15i.FWDG eliminates this vulnerability. The upgrade is hosted for download at software.cisco.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (93247), Tenable (76971), SecurityFocus (BID 67488†), Secunia (SA58695†) and SecurityTracker (ID 1030259†). Further details are available at tools.cisco.com. Similar entry is available at VDB-13259. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

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Nessus ID: 76971
Nessus Name: Cisco IOS XR DHCPv6 Multiple DoS Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: IOS XE 5.2.0.15i.FWDG

Timelineinfo

05/07/2014 🔍
05/19/2014 +12 days 🔍
05/19/2014 +0 days 🔍
05/19/2014 +0 days 🔍
05/20/2014 +1 days 🔍
05/20/2014 +0 days 🔍
05/20/2014 +0 days 🔍
05/20/2014 +0 days 🔍
05/20/2014 +0 days 🔍
05/21/2014 +1 days 🔍
06/20/2021 +2587 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCum85558 / CSCum20949 / CSCul61849 / CSCul71149
Organization: Cisco
Status: Confirmed

CVE: CVE-2014-3271 (🔍)
GCVE (CVE): GCVE-0-2014-3271
GCVE (VulDB): GCVE-100-13260
X-Force: 93247 - Cisco IOS XR DHCP denial of service, Medium Risk
SecurityFocus: 67488 - Cisco IOS XR Software DHCPv6 Packet Handling CVE-2014-3271 Denial of Service Vulnerability
Secunia: 58695 - Cisco IOS XR DHCPv6 Denial of Service Vulnerability, Less Critical
SecurityTracker: 1030259 - Cisco IOS XR DHCPv6 Processing Flaw Lets Remote Users Deny Service
Vulnerability Center: 44579 - Cisco IOS XR 5.2.0.BASE Remote DoS Vulnerability via a Malformed Packet, Medium

scip Labs: https://www.scip.ch/en/?labs.20150108
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 05/20/2014 15:12
Updated: 06/20/2021 06:18
Changes: 05/20/2014 15:12 (52), 05/28/2017 03:29 (34), 06/20/2021 06:18 (3)
Complete: 🔍
Cache ID: 216::103

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