medium
5
CWE
20 264
Advisory Published
Updated

CVE-2015-8023: Input Validation

First published: Wed Nov 18 2015(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Ubuntu=14.04
Ubuntu=15.04
Ubuntu=15.10
strongSwan=4.2.12
strongSwan=4.2.13
strongSwan=4.2.14
strongSwan=4.2.15
strongSwan=4.2.16
strongSwan=4.3.0
strongSwan=4.3.1
strongSwan=4.3.2
strongSwan=4.3.3
strongSwan=4.3.4
strongSwan=4.3.5
strongSwan=4.3.6
strongSwan=4.3.7
strongSwan=4.4.0
strongSwan=4.4.1
strongSwan=4.5.0
strongSwan=4.5.1
strongSwan=4.5.2
strongSwan=4.5.3
strongSwan=4.6.0
strongSwan=4.6.1
strongSwan=4.6.2
strongSwan=4.6.3
strongSwan=4.6.4
strongSwan=5.0.0
strongSwan=5.0.1
strongSwan=5.0.2
strongSwan=5.0.3
strongSwan=5.0.4
strongSwan=5.1.0
strongSwan=5.1.1
strongSwan=5.1.2
strongSwan=5.1.3
strongSwan=5.2.0
strongSwan=5.2.1
strongSwan=5.2.2
strongSwan=5.2.3
strongSwan=5.3.0
strongSwan=5.3.1
strongSwan=5.3.2
strongSwan=5.3.3

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-8023?

    CVE-2015-8023 is classified as a medium severity vulnerability due to its ability to allow authentication bypass.

  • How do I fix CVE-2015-8023?

    To fix CVE-2015-8023, update strongSwan to version 5.3.4 or later.

  • What versions of strongSwan are affected by CVE-2015-8023?

    CVE-2015-8023 affects strongSwan versions from 4.2.12 up to, but not including, 5.3.4.

  • Which operating systems are impacted by CVE-2015-8023?

    CVE-2015-8023 affects Ubuntu Linux versions 14.04, 15.04, and 15.10, as well as multiple versions of strongSwan.

  • What does CVE-2015-8023 exploit in the strongSwan implementation?

    CVE-2015-8023 exploits improper validation of local state in the EAP-MSCHAPv2 protocol, allowing remote attackers to bypass authentication.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203