Security Information / 2017 / Security Information -- DSA-3866-1 strongswan

Debian Security Advisory

DSA-3866-1 strongswan -- security update

Date Reported:

30 May 2017

Affected Packages:

strongswan

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2017-9022, CVE-2017-9023.

More information:

Two denial of service vulnerabilities were identified in strongSwan, an IKE/IPsec suite, using Google's OSS-Fuzz fuzzing project.

• 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.

A fix for a build failure was additionally included in the 5.2.1-6+deb8u4 revision of the strongSwan package.

For the stable distribution (jessie), these problems have been fixed in version 5.2.1-6+deb8u3.

For the upcoming stable distribution (stretch), these problems have been fixed in version 5.5.1-4

For the unstable distribution (sid), these problems have been fixed in version 5.5.1-4.

We recommend that you upgrade your strongswan packages.