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Known exploited vulnerability

CVE-2018-0161

mediumCVSS 3.1 6.3In CISA KEVEPSS 4.1%Published · n/a

The short answer

CVE-2018-0161 affects n/a Cisco IOS and is rated medium (CVSS 6.3). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-03: attackers are using it, so patch it first.

What it is

A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial of service (DoS) condition, aka a GET MIB Object ID Denial of Service Vulnerability. The vulnerability is due to a condition that could occur when the affected software processes an SNMP read request that contains a request for the ciscoFlashMIB object ID (OID). An attacker could trigger this vulnerability by issuing an SNMP GET request for the ciscoFlashMIB OID on an affected device. A successful exploit could cause the affected device to restart due to a SYS-3-CPUHOG. This vulnerability affects the following Cisco devices if they are running a vulnerable release of Cisco IOS Software and are configured to use SNMP Version 2 (SNMPv2) or SNMP Version 3 (SNMPv3): Cisco Catalyst 2960-L Series Switches, Cisco Catalyst Digital Building Series Switches 8P, Cisco Catalyst Digital Building Series Switches 8U. Cisco Bug IDs: CSCvd89541.

Weakness: CWE-399.

Severity

6.3 medium

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

Exploited (CISA KEV)

Yes, since Mar 3, 2022

Federal due date Mar 17, 2022

EPSS, next 30 days

4.1%

Higher than 91% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected products

Cisco IOS. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2018-0161 being exploited?

Yes. CISA added CVE-2018-0161 to its Known Exploited Vulnerabilities catalog on 2022-03-03, with a federal remediation due date of 2022-03-17.

How do I fix CVE-2018-0161?

CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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