VDB-94023 · CVE-2016-9203 · BID 94790

Cisco ASR 5000 20.2.3/20.2.3.65026 ipsecmgr IKEv2 Packet memory corruption

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.
7.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Cisco ASR 5000 20.2.3/20.2.3.65026. The affected element is an unknown function of the component ipsecmgr. Performing a manipulation as part of IKEv2 Packet results in memory corruption. This vulnerability was named CVE-2016-9203. The attack may be initiated remotely. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as critical has been found in Cisco ASR 5000 20.2.3/20.2.3.65026 (Router Operating System). This affects some unknown processing of the component ipsecmgr. The manipulation as part of a IKEv2 Packet leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability.

The bug was discovered 12/07/2016. The weakness was presented 12/07/2016 with Cisco as cisco-sa-20161207-asr1 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2016-9203 since 11/06/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:

The vulnerability is due to a race condition in the IKEv2 negotiation logic. An attacker could exploit this vulnerability by sending crafted IKEv2 packets during a negotiation. An exploit could allow the attacker to cause a crash of the ipsecmgr process, which will restart on its own. Only the connection being negotiated will need to re-establish.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 94790†) and SecurityTracker (ID 1037413†). See VDB-94025 for similar entry. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Router Operating System

Vendor

Cisco

Name

ASR 5000

Version

License

commercial

Website

Vendor: https://www.cisco.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

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: Memory corruption
CWE: CWE-119
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: Patch
Status: 🔍

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

Timelineinfo

11/06/2016 🔍
12/07/2016 +31 days 🔍
12/07/2016 +0 days 🔍
12/07/2016 +0 days 🔍
12/07/2016 +0 days 🔍
12/09/2016 +2 days 🔍
12/10/2016 +1 days 🔍
12/13/2016 +3 days 🔍
10/05/2022 +2122 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20161207-asr1
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9203 (🔍)
GCVE (CVE): GCVE-0-2016-9203
GCVE (VulDB): GCVE-100-94023
SecurityFocus: 94790 - Cisco ASR 5000 Series Software CVE-2016-9203 Denial of Service Vulnerability
SecurityTracker: 1037413

See also: 🔍

Entryinfo

Created: 12/10/2016 18:27
Updated: 10/05/2022 13:30
Changes: 12/10/2016 18:27 (60), 06/23/2019 09:40 (13), 10/05/2022 13:30 (4)
Complete: 🔍
Cache ID: 216::103