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Ubuntu Security Notice USN-3397-1

Ubuntu Security Notice USN-3397-1
Posted Aug 21, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3397-1 - It was discovered that strongSwan incorrectly handled verifying specific RSA signatures. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
SHA-256 | 32827fe34415926cf2c4fb8416aea5fd1cc32d7b7eec1bf583e475dd47a8a1e1

Ubuntu Security Notice USN-3397-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3397-1
August 21, 2017

strongswan vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

strongSwan could be made to crash or hang if it received specially
crafted network traffic.

Software Description:
- strongswan: IPsec VPN solution

Details:

It was discovered that strongSwan incorrectly handled verifying
specific RSA signatures. A remote attacker could use this issue
to cause strongSwan to crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 17.04:
A libstrongswanA A A A A A A A A A A A A A A A A A A 5.5.1-1ubuntu3.2
A strongswanA A A A A A A A A A A A A A A A A A A A A A 5.5.1-1ubuntu3.2

Ubuntu 16.04 LTS:
A libstrongswanA A A A A A A A A A A A A A A A A A A 5.3.5-1ubuntu3.4
A strongswanA A A A A A A A A A A A A A A A A A A A A A 5.3.5-1ubuntu3.4

Ubuntu 14.04 LTS:
A libstrongswanA A A A A A A A A A A A A A A A A A A 5.1.2-0ubuntu2.7
A strongswanA A A A A A A A A A A A A A A A A A A A A A 5.1.2-0ubuntu2.7

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

References:
A https://www.ubuntu.com/usn/usn-3397-1
A CVE-2017-11185

Package Information:
A https://launchpad.net/ubuntu/+source/strongswan/5.5.1-1ubuntu3.2
A https://launchpad.net/ubuntu/+source/strongswan/5.3.5-1ubuntu3.4
A https://launchpad.net/ubuntu/+source/strongswan/5.1.2-0ubuntu2.7
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