CVE-2017-6767: A vulnerability in Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, remote attacker to gain higher privileges t...

Description

A vulnerability in Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, remote attacker to gain higher privileges than the account is assigned. The attacker will be granted the privileges of the last user to log in, regardless of whether those privileges are higher or lower than what should have been granted. The attacker cannot gain root-level privileges. The vulnerability is due to a limitation with how Role-Based Access Control (RBAC) grants privileges to remotely authenticated users when login occurs via SSH directly to the local management interface of the APIC. An attacker could exploit this vulnerability by authenticating to the targeted device. The attacker's privilege level will be modified to match that of the last user to log in via SSH. An exploit could allow the attacker to gain elevated privileges and perform CLI commands that should be restricted by the attacker's configured role. Cisco Bug IDs: CSCvc34335. Known Affected Releases: 1.0(1e), 1.0(1h), 1.0(1k), 1.0(1n), 1.0(2j), 1.0(2m), 1.0(3f), 1.0(3i), 1.0(3k), 1.0(3n), 1.0(4h), 1.0(4o); 1.1(0.920a), 1.1(1j), 1.1(3f); 1.2 Base, 1.2(2), 1.2(3), 1.2.2; 1.3(1), 1.3(2), 1.3(2f); 2.0 Base, 2.0(1).

Metrics

EPSS Probability

1.18%

63.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Cisco	Application Policy Infrastructure Controller	1.0\(1e\)
Cisco	Application Policy Infrastructure Controller	1.0\(1h\)
Cisco	Application Policy Infrastructure Controller	1.0\(1k\)
Cisco	Application Policy Infrastructure Controller	1.0\(1n\)
Cisco	Application Policy Infrastructure Controller	1.0\(2j\)
Cisco	Application Policy Infrastructure Controller	1.0\(2m\)
Cisco	Application Policy Infrastructure Controller	1.0\(3f\)
Cisco	Application Policy Infrastructure Controller	1.0\(3i\)
Cisco	Application Policy Infrastructure Controller	1.0\(3k\)
Cisco	Application Policy Infrastructure Controller	1.0\(3n\)
Cisco	Application Policy Infrastructure Controller	1.0\(4h\)
Cisco	Application Policy Infrastructure Controller	1.0\(4o\)
Cisco	Application Policy Infrastructure Controller	1.1\(0.920a\)
Cisco	Application Policy Infrastructure Controller	1.1\(1j\)
Cisco	Application Policy Infrastructure Controller	1.1\(3f\)
Cisco	Application Policy Infrastructure Controller	1.2\(2\)
Cisco	Application Policy Infrastructure Controller	1.2\(3\)
Cisco	Application Policy Infrastructure Controller	1.2.2
Cisco	Application Policy Infrastructure Controller	1.2_base
Cisco	Application Policy Infrastructure Controller	1.3\(1\)
Cisco	Application Policy Infrastructure Controller	1.3\(2\)
Cisco	Application Policy Infrastructure Controller	1.3\(2f\)
Cisco	Application Policy Infrastructure Controller	2.0\(1\)
Cisco	Application Policy Infrastructure Controller	2.0_base

References

http://www.securityfocus.com/bid/100400Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039180Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-apic1Vendor Advisory
http://www.securityfocus.com/bid/100400Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039180Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170816-apic1Vendor Advisory

Timeline

Published: Aug 17, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6767?

A vulnerability in Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, remote attacker to gain higher privileges than the account is assigned. The attacker will be granted the privileges of the last user to log in, regardless of whether those privileges are higher or lower than what should have been granted. The attacker cannot gain root-level privileges. The vulnerability is due to a limitation with how Role-Based Access Control (RBAC) grants privileges to remotely authenticated users when login occurs via SSH directly to the local management interface of the APIC. An attacker could exploit this vulnerability by authenticating to the targeted device. The attacker's privilege level will be modified to match that of the last user to log in via SSH. An exploit could allow the attacker to gain elevated privileges and perform CLI commands that should be restricted by the attacker's configured role. Cisco Bug IDs: CSCvc34335. Known Affected Releases: 1.0(1e), 1.0(1h), 1.0(1k), 1.0(1n), 1.0(2j), 1.0(2m), 1.0(3f), 1.0(3i), 1.0(3k), 1.0(3n), 1.0(4h), 1.0(4o); 1.1(0.920a), 1.1(1j), 1.1(3f); 1.2 Base, 1.2(2), 1.2(3), 1.2.2; 1.3(1), 1.3(2), 1.3(2f); 2.0 Base, 2.0(1).

How severe is CVE-2017-6767?

Severity scoring for CVE-2017-6767 is pending analysis. The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6767?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.