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CVE-2018-0151

Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability

Exploited in attacks Critical 9.8 Attack chance: 14%
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What it is

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.

CISA: 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.

What to do

Apply updates per vendor instructions.

Deadline for US federal agencies: March 17, 2022

Added to the CISA list
March 3, 2022
Published
March 28, 2018
Severity
Critical 9.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS)
14% in the top 3.4% of all known vulnerabilities
Weakness
CWE-119
More details
NVD · CVE.org · CISA
All references (4)

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Apr 19, 2023SNMP Remote Code ExecutionCVE-2017-6742IOS and IOS XE SoftwareHigh 8.821%
Mar 3, 2022IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-ServiceCVE-2017-6627IOS and IOS XE SoftwareHigh 7.56.2%
Mar 3, 2022IOS Software and Cisco IOS XE Software Denial-of-ServiceCVE-2017-6663IOS and IOS XE SoftwareMedium 6.52.1%
Mar 3, 2022SNMP Remote Code ExecutionCVE-2017-6736IOS and IOS XE SoftwareHigh 8.870%
Mar 3, 2022SNMP Remote Code ExecutionCVE-2017-6737IOS and IOS XE SoftwareHigh 8.845%
Mar 3, 2022SNMP Remote Code ExecutionCVE-2017-6738IOS and IOS XE SoftwareHigh 8.811%
Mar 3, 2022SNMP Remote Code ExecutionCVE-2017-6739IOS and IOS XE SoftwareHigh 8.811%
Mar 3, 2022SNMP Remote Code ExecutionCVE-2017-6740IOS and IOS XE SoftwareHigh 8.811%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.