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Critical StrongSwan Authentication Bypass for Ubuntu 15.10, 15.04, 14.04

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Calendar Grey November 16, 2015
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Ubuntu Security Notice USN-2812-1 tackles a vulnerability in strongSwan that could enable unauthorized access across several editions.
strongSwan could be made to bypass authentication.

Summary

strongSwan could be made to bypass authentication.

Software Description:

- strongswan: IPsec VPN solution

Details:

It was discovered that the strongSwan eap-mschapv2 plugin incorrectly

handled state. A remote attacker could use this issue to bypass

authentication.

Topics%20covered

Topics Covered

security advisory critical Ubuntu authentication bypass IPsec strongSwan eap-mschapv2

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 15.10:
  strongswan-plugin-eap-mschapv2  5.1.2-0ubuntu6.2

Ubuntu 15.04:
  strongswan-plugin-eap-mschapv2  5.1.2-0ubuntu5.3

Ubuntu 14.04 LTS:
  strongswan-plugin-eap-mschapv2  5.1.2-0ubuntu2.4

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2811-1

CVE-2015-8023

Severity
critical
Lowest
Low
Medium
High
Critical

November 16, 2015

Topics%20covered

Topics Covered

security advisory critical Ubuntu authentication bypass IPsec strongSwan eap-mschapv2

Package Information

https://launchpad.net/ubuntu/+source/strongswan/5.1.2-0ubuntu6.2
https://launchpad.net/ubuntu/+source/strongswan/5.1.2-0ubuntu5.3
https://launchpad.net/ubuntu/+source/strongswan/5.1.2-0ubuntu2.4

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