SB2018081403 - Information disclosure in IKEv1 implementation in Cisco IOS
Published: August 14, 2018 Updated: January 10, 2019
Security Bulletin ID
SB2018081403
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Information disclosure (CVE-ID: CVE-2018-0131)
The vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to error in IKEv1 implementation that allows an attacker to launch Bleichenbacher style attacks against RSA encrypted nonces. A remote non-authenticated attacker can perform a MitM (man-in-the-middle) attack and decrypt data transferred over IKEv1 channel.
Remediation
Install update from vendor's website.