VDB-104578 · CVE-2017-6770 · BID 100005

Cisco NX-OS on Nexus 7000 OSPF LSA input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Cisco NX-OS on Nexus 7000. Affected by this issue is some unknown functionality of the component OSPF LSA. Executing a manipulation can lead to input validation. This vulnerability appears as CVE-2017-6770. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Cisco NX-OS on Nexus 7000 (Router Operating System) (unknown version). It has been declared as critical. This vulnerability affects an unknown code block of the component OSPF LSA. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, and integrity.

The bug was discovered 07/27/2017. The weakness was presented 07/27/2017 by Gabi Nakibly as cisco-sa-20170727-ospf as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability was named CVE-2017-6770 since 03/09/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not 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†). See VDB-104579, VDB-104580 and VDB-104581 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

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

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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: 🔍

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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-100-104578

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 15:25
Changes: 07/28/2017 09:59 (78), 06/06/2020 20:16 (12), 01/06/2021 15:25 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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