USN-3301-1: strongSwan vulnerabilities

Releases

• Ubuntu 17.04
• Ubuntu 16.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• strongswan - IPsec VPN solution

Details

It was discovered that the strongSwan gmp plugin incorrectly validated RSA
public keys. A remote attacker could use this issue to cause strongSwan to
crash, resulting in a denial of service. (CVE-2017-9022)

It was discovered that strongSwan incorrectly parsed ASN.1 CHOICE types. A
remote attacker could use this issue to cause strongSwan to hang, resulting
in a denial of service. (CVE-2017-9023)

Update instructions

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

Ubuntu 17.04

• libstrongswan - 5.5.1-1ubuntu3.1
• strongswan - 5.5.1-1ubuntu3.1

Ubuntu 16.10

• libstrongswan - 5.3.5-1ubuntu4.3
• strongswan - 5.3.5-1ubuntu4.3
• strongswan-plugin-gmp - 5.3.5-1ubuntu4.3

Ubuntu 16.04

• libstrongswan - 5.3.5-1ubuntu3.3
• strongswan - 5.3.5-1ubuntu3.3
• strongswan-plugin-gmp - 5.3.5-1ubuntu3.3

Ubuntu 14.04

• libstrongswan - 5.1.2-0ubuntu2.6
• strongswan - 5.1.2-0ubuntu2.6
• strongswan-plugin-gmp - 5.1.2-0ubuntu2.6

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

References

• CVE-2017-9022
• CVE-2017-9023