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CVE-2019-1858

HIGHCVSS 8.6/10EPSS 2.62%

Last modified

CVE-2019-1858 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 2.62% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
2.62%

83.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoNx-Os< 8.1\(1\)
CiscoNx-Os< 7.0\(3\)i4\(8\)
CiscoNx-Os>= 7.0\(3\)i7, < 7.0\(3\)i7\(2\)
CiscoNx-Os>= 7.0\(3\), < 7.0\(3\)f3\(1\)
CiscoNx-Os< 7.1\(5\)n1\(1b\)
CiscoNx-Os>= 7.3, < 7.3\(4\)n1\(1a\)
CiscoNx-Os< 6.2\(22\)
CiscoNx-Os>= 7.2, < 7.2\(0\)d1\(1\)
CiscoNx-Os>= 8.0, < 8.1\(1\)
CiscoFirepower Extensible Operating System>= 2.6, < 2.6.1.131
CiscoFx-Os< 2.2.2.91
CiscoFx-Os>= 2.3, < 2.3.1.130
CiscoFx-Os>= 2.4, < 2.4.1.222
CiscoNx-Os< 14.0\(2c\)
CiscoNx-Os>= 14.1, < 14.1\(1i\)
CiscoNx-Os< 6.0\(2\)a8\(4\)
CiscoNx-Os< 5.2\(1\)sv3\(4.1a\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-1858?
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.
How severe is CVE-2019-1858?
CVE-2019-1858 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 2.62% probability of exploitation in the next 30 days.
How do I fix CVE-2019-1858?
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.

Are you affected by CVE-2019-1858?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST