Vulnerability in Cisco iOS
CVE-2018-0131
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.017 (76.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Cisco iOS — versions 15.5\(3\)s, 15.5(3)s
- Cisco iOS Xe — versions 15.5\(3\)s, 15.5(3)s
- Cisco Systems, Inc. iOS And Xe — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1041539 (VDB Entry, Third Party Advisory, vdb-entry)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180813… (vendor-advisory, Vendor Advisory)
- www.securityfocus.com/bid/105074 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2018-0131?
- CVE-2018-0131 is a medium-severity vulnerability in Cisco iOS, classified under Inadequate Encryption Strength. CVSS score: 5.9/10. Published 2018-08-14.
- How severe is CVE-2018-0131?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2018-0131 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.