SB2015111801 - Input validation error in strongSwan
Published: November 18, 2015 Updated: July 28, 2020
Security Bulletin ID
SB2015111801
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2015-8023)
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The server implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin in strongSwan 4.2.12 through 5.x before 5.3.4 does not properly validate local state, which allows remote attackers to bypass authentication via an empty Success message in response to an initial Challenge message.
Remediation
Install update from vendor's website.
References
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00025.html
- http://lists.opensuse.org/opensuse-updates/2015-11/msg00139.html
- http://www.debian.org/security/2015/dsa-3398
- http://www.securityfocus.com/bid/84947
- http://www.ubuntu.com/usn/USN-2811-1
- https://www.strongswan.org/blog/2015/11/16/strongswan-vulnerability-(cve-2015-8023).html