Actively exploited in the wild
Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution 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-2018-0151
CriticalCVSS 9.8KEVSummary
A vulnerability in the QoS subsystem of Cisco IOS and IOS XE Software is due to incorrect bounds checking of values in packets destined for UDP port 18999. An unauthenticated remote attacker can send malicious packets, causing a buffer overflow that may lead to arbitrary code execution with elevated privileges or a device reload.
Risk Assessment
Exploitation could allow an attacker to execute code with elevated privileges or cause a temporary denial of service (DoS), threatening the security and availability of the network infrastructure.
Recommendation
Apply the available Cisco patches and consider filtering traffic destined for UDP port 18999 to reduce the possibility of exploitation.
Other vulnerabilities in Cisco IOS Software and Cisco IOS XE Software
Original NVD description (English source)
A vulnerability in the quality of service (QoS) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges. The vulnerability is due to incorrect bounds checking of certain values in packets that are destined for UDP port 18999 of an affected device. An attacker could exploit this vulnerability by sending malicious packets to an affected device. When the packets are processed, an exploitable buffer overflow condition may occur. A successful exploit could allow the attacker to execute arbitrary code on the affected device with elevated privileges. The attacker could also leverage this vulnerability to cause the device to reload, causing a temporary DoS condition while the device is reloading. The malicious packets must be destined to and processed by an affected device. Traffic transiting a device will not trigger the vulnerability. Cisco Bug IDs: CSCvf73881.