Debian Wheezy DLA-973-1 Moderate: StrongSwan Denial Of Service

CVE-2017-9022

RSA public keys passed to the gmp plugin aren't validated sufficiently
before attempting signature verification, so that invalid input might
lead to a floating point exception and crash of the process.
A certificate with an appropriately prepared public key sent by a peer
could be used for a denial-of-service attack.

CVE-2017-9023

ASN.1 CHOICE types are not correctly handled by the ASN.1 parser when
parsing X.509 certificates with extensions that use such types. This could
lead to infinite looping of the thread parsing a specifically crafted
certificate.

For Debian 7 "Wheezy", these problems have been fixed in version
4.5.2-1.5+deb7u9.

We recommend that you upgrade your strongswan packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS