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Debian Security Advisory DSA 3866-1 (strongswan - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

5 years ago

Modified

Modified

8 months ago

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.

Common Vulnerabilities and Exposures (CVE)