Test Kennung:	1.3.6.1.4.1.25623.1.0.704305
Kategorie:	Debian Local Security Checks
Titel:	Debian Security Advisory DSA 4305-1 (strongswan - security update)
Zusammenfassung:	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.
Beschreibung:	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/OS: strongswan on Debian Linux 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. CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Querverweis:	Common Vulnerability Exposure (CVE) ID: CVE-2018-16151 Common Vulnerability Exposure (CVE) ID: CVE-2018-16152
Copyright	Copyright (C) 2018 Greenbone Networks GmbH

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