Zero-friction vulnerability management platform

Mageni eases for you the vulnerability scanning, assessment, and management process. It is free and open-source.

Install Now

Available for macOS, Windows, and Linux

App screenshot

Debian Security Advisory DSA 4305-1 (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:P/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

3 years ago

Modified

Modified

3 years ago

Summary

Sze Yiu Chau and his team from Purdue University and The University of Iowa found several issues in the gmp plugin for strongSwan, an IKE/IPsec suite. Problems in the parsing and verification of RSA signatures could lead to a Bleichenbacher-style low-exponent signature forgery in certificates and during IKE authentication. While the gmp plugin doesn't allow arbitrary data after the ASN.1 structure (the original Bleichenbacher attack), the ASN.1 parser is not strict enough and allows data in specific fields inside the ASN.1 structure. Only installations using the gmp plugin are affected (on Debian OpenSSL plugin has priority over GMP one for RSA operations), and only when using keys and certificates (including ones from CAs) using keys with an exponent e = 3, which is usually rare in practice. CVE-2018-16151 The OID parser in the ASN.1 code in gmp allows any number of random bytes after a valid OID. CVE-2018-16152 The algorithmIdentifier parser in the ASN.1 code in gmp doesn't enforce a NULL value for the optional parameter which is not used with any PKCS#1 algorithm.

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 (stretch), these problems have been fixed in version 5.5.1-4+deb9u3. We recommend that you upgrade your strongswan packages. For the detailed security status of strongswan please refer to its security tracker page linked in the references.

Common Vulnerabilities and Exposures (CVE)