CVE-2018-0159

Cisco IOS Software and Cisco IOS XE Software: IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service

As of , CVE-2018-0159 in Cisco IOS Software and Cisco IOS XE Software is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 3 March 2022
US federal deadline
17 March 202214 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.07Higher than 93% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.01 on 3 March 2022EPSS on the day CISA listed it.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial-of-service (DoS) condition.

CISA's description

A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.

The CVE record's description, from cisco

CVE published
28 March 2018
Assigned by
cisco
CVSS
7.5 High (CVSS 3.1, from CISA-ADP)
CWE-20
Improper Input Validation
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
partial

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

IOS Software and Cisco IOS XE Software: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2018-0156Smart Install Denial-of-ServiceCisco IOS Software and Cisco IOS XE SoftwarePatch soon0.09
CVE-2018-0158IOS and XE Software Internet Key Exchange Memory LeakCisco IOS Software and Cisco IOS XE SoftwarePatch soon0.07

Read further