-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-4305-1 security@xxxxxxxxxx https://www.debian.org/security/ Yves-Alexis Perez September 24, 2018 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : strongswan CVE ID : CVE-2018-16151 CVE-2018-16152 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. 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 at: https://security-tracker.debian.org/tracker/strongswan Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@xxxxxxxxxxxxxxxx -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEE8vi34Qgfo83x35gF3rYcyPpXRFsFAluo4U0ACgkQ3rYcyPpX RFv1HQf9Fn8JyDrflvxIsTb0vkgyTPMn6d1QKsO58I00HNh+AWL3RvK1k7uFCHgr C+pZDxbE5LdEypZ8hHdhxRH1hrnWlYCZjLrm8RojuPo7E6N9w9AnXdztSpqHR3G/ PFm/u4FC+l/Qh9imKZoUjGGItDOT5WGvKNeS+cZNIVmz1uoOwdJuEaDSBlv4pSeh tDi3GtXdLjPzLk/sw0o732zpyPd9RCQqABryamK6dco4EI9BmFHwwhaepXV0pH7W JEk7Cqow1XYUnPAZg1CqHE/vYdWu2SCEBetvAyhchTp+ZmG1icHy6zQA48pOQ7VP 8ezE8lP9+j/2ZGmORCsyyua5FYaLbA== =4jkg -----END PGP SIGNATURE-----
