VDB-104580 · CVE-2017-6770 · BID 100005

Cisco ASA OSPF LSA input validation

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Cisco ASA. This vulnerability affects unknown code of the component OSPF LSA. The manipulation results in input validation. This vulnerability is known as CVE-2017-6770. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Cisco ASA (Firewall Software) (version unknown). Affected is an unknown function of the component OSPF LSA. 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 confidentiality, and integrity.

The bug was discovered 07/27/2017. The weakness was published 07/27/2017 by Gabi Nakibly as cisco-sa-20170727-ospf as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2017-6770 since 03/09/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The advisory points out:

Multiple Cisco products are affected by a vulnerability involving the Open Shortest Path First (OSPF) Routing Protocol Link State Advertisement (LSA) database. This vulnerability could allow an unauthenticated, remote attacker to take full control of the OSPF Autonomous System (AS) domain routing table, allowing the attacker to intercept or black-hole traffic.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 316160 (Cisco IOS OSPF LSA Manipulation Vulnerability (cisco-sa-20170727-ospf)). The advisory illustrates:

To exploit this vulnerability, an attacker must accurately determine certain parameters within the LSA database on the target router. This vulnerability can only be triggered by sending crafted unicast or multicast OSPF LSA type 1 packets. No other LSA type packets can trigger this vulnerability.

Upgrading eliminates this vulnerability. It is possible to mitigate the problem by adding OSPF MD5 Authentication as an authentication mechanism. The best possible mitigation is suggested to be upgrading to the latest version. The advisory contains the following remark:

OSPFv3 is not affected by this vulnerability. Fabric Shortest Path First (FSPF) protocol is not affected by this vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 100005†) and SecurityTracker (ID 1039005†). Similar entries are available at VDB-104578, VDB-104579 and VDB-104581. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Firewall Software

Vendor

Cisco

Name

License

commercial

Website

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

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Cisco): 4.2
Vendor Vector (Cisco): 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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

OpenVAS ID: 800316
OpenVAS Name: Cisco ASA OSPF LSA Manipulation Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/09/2017 🔍
07/27/2017 +140 days 🔍
07/27/2017 +0 days 🔍
07/27/2017 +0 days 🔍
07/27/2017 +0 days 🔍
07/28/2017 +1 days 🔍
08/07/2017 +10 days 🔍
01/06/2021 +1248 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20170727-ospf
Researcher: Gabi Nakibly
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6770 (🔍)
GCVE (CVE): GCVE-0-2017-6770
GCVE (VulDB): GCVE-100-104580

OVAL: 🔍

SecurityFocus: 100005 - Multiple Cisco Products CVE-2017-6770 Remote Security Bypass Vulnerability
SecurityTracker: 1039005

See also: 🔍

Entryinfo

Created: 07/28/2017 09:59
Updated: 01/06/2021 15:37
Changes: 07/28/2017 09:59 (78), 11/01/2019 19:42 (12), 01/06/2021 15:37 (2)
Complete: 🔍
Cache ID: 216::103