Security update for openvpn-openssl1 SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2017:1718-1 Final 1 1 2017-06-29T11:41:38Z current 2017-06-29T11:41:38Z 2017-06-29T11:41:38Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for openvpn-openssl1 This update for openvpn-openssl1 fixes the following issues: - Some parts of the certificate-parsing code did not always clear all allocated memory. This would have allowed clients to leak a few bytes of memory for each connection attempt, thereby facilitating a (quite inefficient) DoS attack on the server. [bsc#1044947, CVE-2017-7521] - The ASN1 parsing code contained a bug that could have resulted in some buffers being free()d twice, and this issue could have potentially been triggered remotely by a VPN peer. [bsc#1044947, CVE-2017-7521] - If clients used a HTTP proxy with NTLM authentication, a man-in-the-middle attacker between client and proxy could cause the client to crash or disclose at most 96 bytes of stack memory. The disclosed stack memory was likely to contain the proxy password. If the proxy password had not been reused, this was unlikely to compromise the security of the OpenVPN tunnel itself. Clients who did not use the --http-proxy option with ntlm2 authentication were not affected. [bsc#1044947, CVE-2017-7520] - It was possible to trigger an assertion by sending a malformed IPv6 packet. That issue could have been abused to remotely shutdown an openvpn server or client, if IPv6 and --mssfix were enabled and if the IPv6 networks used inside the VPN were known. [bsc#1044947, CVE-2017-7508] - The installed sample configuration file was updated to comply to FIPS requirements. [bsc#988522] - Remedy large latencies on the openVPN server during authentication process. [bsc#959511] - Fix potential denial-of-service attacks found during independent audits. [bsc#1038713, bsc#1038709, CVE-2017-7478, bsc#1038711, CVE-2017-7479] The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). secsp3-openvpn-openssl1-13182 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2017/suse-su-20171718-1/ Link for SUSE-SU-2017:1718-1 https://lists.opensuse.org/opensuse-security-announce/2017-06/msg00042.html E-Mail link for SUSE-SU-2017:1718-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1038709 SUSE Bug 1038709 https://bugzilla.suse.com/1038711 SUSE Bug 1038711 https://bugzilla.suse.com/1038713 SUSE Bug 1038713 https://bugzilla.suse.com/1044947 SUSE Bug 1044947 https://bugzilla.suse.com/959511 SUSE Bug 959511 https://bugzilla.suse.com/988522 SUSE Bug 988522 https://www.suse.com/security/cve/CVE-2017-7478/ SUSE CVE CVE-2017-7478 page https://www.suse.com/security/cve/CVE-2017-7479/ SUSE CVE CVE-2017-7479 page https://www.suse.com/security/cve/CVE-2017-7508/ SUSE CVE CVE-2017-7508 page https://www.suse.com/security/cve/CVE-2017-7520/ SUSE CVE CVE-2017-7520 page https://www.suse.com/security/cve/CVE-2017-7521/ SUSE CVE CVE-2017-7521 page SUSE Linux Enterprise Server 11-SECURITY openvpn-openssl1-2.3.2-0.9.1 openvpn-openssl1-down-root-plugin-2.3.2-0.9.1 openvpn-openssl1-2.3.2-0.9.1 as a component of SUSE Linux Enterprise Server 11-SECURITY openvpn-openssl1-down-root-plugin-2.3.2-0.9.1 as a component of SUSE Linux Enterprise Server 11-SECURITY OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2. CVE-2017-7478 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-2.3.2-0.9.1 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-down-root-plugin-2.3.2-0.9.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2017/suse-su-20171718-1/ https://www.suse.com/security/cve/CVE-2017-7478.html CVE-2017-7478 https://bugzilla.suse.com/1038709 SUSE Bug 1038709 https://bugzilla.suse.com/1038713 SUSE Bug 1038713 OpenVPN versions before 2.3.15 and before 2.4.2 are vulnerable to reachable assertion when packet-ID counter rolls over resulting into Denial of Service of server by authenticated attacker. CVE-2017-7479 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-2.3.2-0.9.1 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-down-root-plugin-2.3.2-0.9.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2017/suse-su-20171718-1/ https://www.suse.com/security/cve/CVE-2017-7479.html CVE-2017-7479 https://bugzilla.suse.com/1038711 SUSE Bug 1038711 https://bugzilla.suse.com/1038713 SUSE Bug 1038713 OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service when receiving malformed IPv6 packet. CVE-2017-7508 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-2.3.2-0.9.1 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-down-root-plugin-2.3.2-0.9.1 important 5.4 AV:N/AC:H/Au:N/C:N/I:N/A:C To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2017/suse-su-20171718-1/ https://www.suse.com/security/cve/CVE-2017-7508.html CVE-2017-7508 https://bugzilla.suse.com/1044947 SUSE Bug 1044947 OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker. CVE-2017-7520 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-2.3.2-0.9.1 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-down-root-plugin-2.3.2-0.9.1 important 7.8 AV:N/AC:M/Au:N/C:P/I:N/A:C To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2017/suse-su-20171718-1/ https://www.suse.com/security/cve/CVE-2017-7520.html CVE-2017-7520 https://bugzilla.suse.com/1044947 SUSE Bug 1044947 OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension(). CVE-2017-7521 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-2.3.2-0.9.1 SUSE Linux Enterprise Server 11-SECURITY:openvpn-openssl1-down-root-plugin-2.3.2-0.9.1 important 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2017/suse-su-20171718-1/ https://www.suse.com/security/cve/CVE-2017-7521.html CVE-2017-7521 https://bugzilla.suse.com/1044947 SUSE Bug 1044947