CVE-2018-0131

Name: CVE-2018-0131
Creator: NVD / NIST
Published: 2018-08-14T16:29:00.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.72%

Last modified Jun 17, 2026

CVE-2018-0131 is a vulnerability of currently unknown severity. A vulnerability in the implementation of RSA-encrypted nonces in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to obtain the encrypted nonces of an Internet Key Exchange Version 1 (IKEv1) session. The vulnerability exists because the affected software responds incorrectly to decryption failures. EPSS estimates a 1.72% chance of exploitation in the next 30 days.

Description

A vulnerability in the implementation of RSA-encrypted nonces in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to obtain the encrypted nonces of an Internet Key Exchange Version 1 (IKEv1) session. The vulnerability exists because the affected software responds incorrectly to decryption failures. An attacker could exploit this vulnerability sending crafted ciphertexts to a device configured with IKEv1 that uses RSA-encrypted nonces. A successful exploit could allow the attacker to obtain the encrypted nonces. Cisco Bug IDs: CSCve77140.

Metrics

EPSS Probability

1.72%

74.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios	15.5\(3\)s
Cisco	Ios Xe	15.5\(3\)s

References

http://www.securityfocus.com/bid/105074Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041539Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180813-rsa-nonceVendor Advisory
http://www.securityfocus.com/bid/105074Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041539Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180813-rsa-nonceVendor Advisory

Timeline

Published: Aug 14, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0131?

How severe is CVE-2018-0131?

Severity scoring for CVE-2018-0131 is pending analysis. The EPSS model estimates a 1.72% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0131?

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-2018-0131?

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

Scan your code now

Source: NVD / NIST