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

CVSS Meta Temp Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS XR 5.2.0.BASE on Cisco ASR 9000. This issue affects some unknown processing of the component DHCPv6 Handler. The manipulation leads to input validation. This vulnerability is traded as CVE-2014-3270. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS XR 5.2.0.BASE on Cisco ASR 9000 (Router Operating System). This issue affects an unknown functionality of the component DHCPv6 Handler. The manipulation with an unknown input leads to a input validation vulnerability. 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:

The DHCPv6 implementation in Cisco IOS XR allows remote attackers to cause a denial of service (process hang) via a malformed packet, aka Bug ID CSCul80924.

The weakness was shared 05/19/2014 with Cisco as CSCul80924 as confirmed security notice (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2014-3270 since 05/07/2014. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not 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 5.1.1.19i.FWDG, 5.1.2.10i.FWDG, 5.1.11.13i.FWDG or 5.2.0.12i.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 (93246), Tenable (76971), SecurityFocus (BID 67492†), Secunia (SA58695†) and SecurityTracker (ID 1030259†). tools.cisco.com is providing further details. The entry VDB-13260 is related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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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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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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EPSS Percentile: 🔍

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

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: IOS XR 5.1.1.19i.FWDG/5.1.2.10i.FWDG/5.1.11.13i.FWDG/5.2.0.12i.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 🔍
08/01/2014 +72 days 🔍
06/20/2021 +2515 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCul80924
Organization: Cisco
Status: Confirmed

CVE: CVE-2014-3270 (🔍)
GCVE (CVE): GCVE-0-2014-3270
GCVE (VulDB): GCVE-100-13259
X-Force: 93246 - Cisco IOS XR DHCP denial of service, Medium Risk
SecurityFocus: 67492 - Cisco IOS XR Software DHCPv6 Packet Handling CVE-2014-3270 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: 44584 - 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.: 🔍
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Entryinfo

Created: 05/20/2014 15:09
Updated: 06/20/2021 06:06
Changes: 05/20/2014 15:09 (51), 05/28/2017 03:32 (36), 06/20/2021 06:06 (3)
Complete: 🔍
Cache ID: 216::103

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