Actively exploited in the wild
Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerability
Cisco - IOS and IOS XE Software · Listed in the CISA KEV since 2022-03-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2017-6663
MediumCVSS 6.5KEVSummary
A vulnerability in the Autonomic Networking feature of Cisco IOS Software and Cisco IOS XE Software allows an unauthenticated, adjacent attacker to cause autonomic nodes to reload, resulting in a denial of service (DoS). Known affected releases include Denali-16.2.1 and Denali-16.3.1.
Risk Assessment
Organizations using Cisco IOS/IOS XE with Autonomic Networking enabled may experience autonomic node reloads and network service disruptions.
Recommendation
Upgrade Cisco IOS/IOS XE to a release containing the fix for CSCvd88936 or disable/restrict the Autonomic Networking feature where feasible.
Other vulnerabilities in Cisco IOS XE
See all- CVE-2017-12230High
A vulnerability in the web-based user interface of Cisco IOS XE 16.2 could allow an authenticated, remote attacker to elevate their privileges on an affected device. The vulnerability is due to incorrect default permission settings for new users created using the web UI.
- CVE-2016-6378High
Cisco IOS XE versions 3.1 through 3.17 and 16.1 through 16.2 are vulnerable to an attack that can cause device reload via crafted ICMP packets requiring NAT.
- CVE-2016-6386High
Cisco IOS XE versions 3.1 through 3.17 and 16.1 on 64-bit platforms allow remote attackers to cause a denial of service (data-structure corruption and device reload) via fragmented IPv4 packets.
- CVE-2015-6282High
Cisco IOS XE 2.x and 3.x before 3.10.6S, 3.11.xS through 3.13.xS before 3.13.3S, and 3.14.xS through 3.15.xS before 3.15.1S are vulnerable to an attack that can lead to denial of service by causing device reload. Attackers can exploit IPv4 packets that require NAT and MPLS actions.
- CVE-2015-0645High
The Layer 4 Redirect (L4R) feature in Cisco IOS XE 2.x and 3.x before 3.10.4S, 3.11 before 3.11.3S, 3.12 before 3.12.2S, 3.13 before 3.13.1S, 3.14 before 3.14.0S, and 3.15 before 3.15.0S allows remote attackers to cause a denial of service (device reload) via malformed IPv4 or IPv6 packets.
- CVE-2015-0644High
AppNav in Cisco IOS XE versions 3.8 through 3.10 before 3.10.3S, 3.11 before 3.11.3S, 3.12 before 3.12.1S, 3.13 before 3.13.0S, 3.14 before 3.14.0S, and 3.15 before 3.15.0S allows remote attackers to execute arbitrary code or cause a denial of service (device reload) via a crafted TCP packet, aka Bug ID CSCuo53622.
- CVE-2015-0641High
Cisco IOS XE versions 2.x and 3.x before 3.9.0S, 3.10 before 3.10.0S, 3.11 before 3.11.0S, 3.12 before 3.12.0S, 3.13 before 3.13.0S, 3.14 before 3.14.0S, and 3.15 before 3.15.0S are vulnerable to a denial of service attack that can cause device reload via crafted IPv6 packets. This vulnerability is known as Bug ID CSCub68073.
- CVE-2015-0639High
The Common Flow Table (CFT) feature in Cisco IOS XE versions 3.6 and 3.7 before 3.7.1S and in versions 3.8 to 3.15 before respective updates allows remote attackers to cause a denial of service (device reload) via malformed IPv6 packets with IPv4 UDP encapsulation.
Original NVD description (English source)
A vulnerability in the Autonomic Networking feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause autonomic nodes of an affected system to reload, resulting in a denial of service (DoS) condition. More Information: CSCvd88936. Known Affected Releases: Denali-16.2.1 Denali-16.3.1.