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Debian Security Advisory DSA 3866-1 (strongswan - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
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.
Affected Software
Affected Software
strongswan on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
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.