CVE-2017-6770 — MEDIUM (4.2)

Vulnerability Description

Cisco IOS 12.0 through 15.6, Adaptive Security Appliance (ASA) Software 7.0.1 through 9.7.1.2, NX-OS 4.0 through 12.0, and IOS XE 3.6 through 3.18 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 attacker could exploit this vulnerability by injecting crafted OSPF packets. Successful exploitation could cause the targeted router to flush its routing table and propagate the crafted OSPF LSA type 1 update throughout the OSPF AS domain. 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. OSPFv3 is not affected by this vulnerability. Fabric Shortest Path First (FSPF) protocol is not affected by this vulnerability. Cisco Bug IDs: CSCva74756, CSCve47393, CSCve47401.

CVSS Score

4.2

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Cisco	Nx-Os	1.1\(0.825a\)
Cisco	Nx-Os For Nexus 5500 Platform Switches	7.3\(1\)n1\(1\)
Cisco	Nx-Os For Nexus 5600 Platform Switches	7.3\(1\)n1\(1\)
Cisco	Nx-Os For Nexus 7700 Series Switches	8.0\(1\)\(ed\)
Cisco	Adaptive Security Appliance Software	7.0.1
Cisco	Ios	12.0\(1\)
Cisco	Ios Xe	3.6.0e

Related Weaknesses (CWE)

CWE-20

References

http://www.securityfocus.com/bid/100005Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039005Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039006Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039007Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory
http://www.securityfocus.com/bid/100005Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039005Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039006Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039007Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-2Vendor Advisory

FAQ

What is CVE-2017-6770?

CVE-2017-6770 is a vulnerability with a CVSS score of 4.2 (MEDIUM). Cisco IOS 12.0 through 15.6, Adaptive Security Appliance (ASA) Software 7.0.1 through 9.7.1.2, NX-OS 4.0 through 12.0, and IOS XE 3.6 through 3.18 are affected by a vulnerability involving the Open Sh...

How severe is CVE-2017-6770?

CVE-2017-6770 has been rated MEDIUM with a CVSS base score of 4.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2017-6770?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Nx-Os For Nexus 5500 Platform Switches, Cisco Nx-Os For Nexus 5600 Platform Switches, Cisco Nx-Os For Nexus 7700 Series Switches, Cisco Adaptive Security Appliance Software.