CVE-2019-1858: Cisco FXOS and NX-OS Software Simple Network Management Protocol Denial of Service Vulnerability
A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the SNMP application to leak system memory, which could cause an affected device to restart unexpectedly. The vulnerability is due to improper error handling when processing inbound SNMP packets. An attacker could exploit this vulnerability by sending multiple crafted SNMP packets to an affected device. A successful exploit could allow the attacker to cause the SNMP application to leak system memory because of an improperly handled error condition during packet processing. Over time, this memory leak could cause the SNMP application to restart multiple times, leading to a system-level restart and a denial of service (DoS) condition.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2019-1858?
CVE-2019-1858 is categorized with a high severity level due to its potential impact on system stability.
How do I fix CVE-2019-1858?
To mitigate CVE-2019-1858, Cisco recommends upgrading to the fixed software versions available in their security advisory.
Which Cisco devices are affected by CVE-2019-1858?
CVE-2019-1858 affects multiple Cisco NX-OS and FXOS versions, specifically those under version 8.1(1) and before 7.0(3)i7(2).
Can CVE-2019-1858 be exploited remotely?
Yes, CVE-2019-1858 can be exploited by an unauthenticated remote attacker.
What does CVE-2019-1858 impact in my Cisco devices?
CVE-2019-1858 impacts the Simple Network Management Protocol (SNMP) leak in system memory, which may lead to device restarts.