This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============2497416986280918410==
Content-Language: en-CA
Content-Type: multipart/signed; micalg=pgp-sha256;
 protocol="application/pgp-signature";
 boundary="------------FnIXME3mpcZrSjAsSWwBQjM9"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--------------FnIXME3mpcZrSjAsSWwBQjM9
Content-Type: multipart/mixed;
 boundary="------------M0iVFr9xLpgufx0VlDVd6CZD";
 protected-headers="v1"
From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: "ubuntu-security-announce@lists.ubuntu.com"
 <ubuntu-security-announce@lists.ubuntu.com>
Message-ID: <4125c8ce-ce82-4dbf-9fc8-750c7a08c40d@canonical.com>
Subject: [USN-6488-1] strongSwan vulnerability

--------------M0iVFr9xLpgufx0VlDVd6CZD
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: base64

==========================================================================
Ubuntu Security Notice USN-6488-1
November 20, 2023

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

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

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

Software Description:
- strongswan: IPsec VPN solution

Details:

Florian Picca discovered that strongSwan incorrectly handled certain DH
public values. A remote attacker could use this issue to cause strongSwan
to crash, resulting in a denial of service, or possibly execute arbitrary
code.

Update instructions:

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

Ubuntu 23.10:
   libstrongswan                   5.9.11-1ubuntu1.1
   strongswan                      5.9.11-1ubuntu1.1

Ubuntu 23.04:
   libstrongswan                   5.9.8-3ubuntu4.1
   strongswan                      5.9.8-3ubuntu4.1

Ubuntu 22.04 LTS:
   libstrongswan                   5.9.5-2ubuntu2.2
   strongswan                      5.9.5-2ubuntu2.2

Ubuntu 20.04 LTS:
   libstrongswan                   5.8.2-1ubuntu3.6
   strongswan                      5.8.2-1ubuntu3.6

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

References:
   https://ubuntu.com/security/notices/USN-6488-1
   CVE-2023-41913

Package Information:
   https://launchpad.net/ubuntu/+source/strongswan/5.9.11-1ubuntu1.1
   https://launchpad.net/ubuntu/+source/strongswan/5.9.8-3ubuntu4.1
   https://launchpad.net/ubuntu/+source/strongswan/5.9.5-2ubuntu2.2
   https://launchpad.net/ubuntu/+source/strongswan/5.8.2-1ubuntu3.6

--------------M0iVFr9xLpgufx0VlDVd6CZD--

--------------FnIXME3mpcZrSjAsSWwBQjM9
Content-Type: application/pgp-signature; name="OpenPGP_signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="OpenPGP_signature.asc"

-----BEGIN PGP SIGNATURE-----
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=SMrT
-----END PGP SIGNATURE-----

--------------FnIXME3mpcZrSjAsSWwBQjM9--


--===============2497416986280918410==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

Cg==

--===============2497416986280918410==--