Security Bulletin for MiVB-X SECURITY BULLETIN ID: 16-0007-008 RELEASE VERSION: 1.0 DATE: 2016-04-08 SECURITY BULLETIN 16-0007-008 V1.0 OVERVIEW This security bulletin provides product-specific details on the vulnerability described in Mitel Security Advisory 16-0007. Visit http://www.mitel.com/security-advisories for more details. MiVoice Business Express (MiVB-X) has been confirmed as being affected by a DNS libresolv vulnerability in glibc (CVE-2015-7547). Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc or libc6) before 2.23 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted DNS response that triggers a call to the getaddrinfo function with the AF_UNSPEC or AF_INET6 address family, related to performing "dual A/AAAA DNS queries" and the libnss_dns.so.2 NSS module. APPLICABLE PRODUCTS This security bulletin provides information on the following products: PRODUCT NAME VERSION(S) AFFECTED SOLUTION(S) AVAILABLE Micollab with Voice 220.127.116.11 Upgrade OVA to 18.104.22.168 MiVoice Business Express 22.214.171.124 Upgrade to MSL 10.3.38.0 or upgrade OVA to 126.96.36.199 RISK / EXPOSURE Below are the CVSS scores as published by the vendor: CVSS V2.0 OVERALL SCORE: 6.8 CVSS V2.0 VECTOR: AV:N/AC:M/Au:N/C:P/I:P/A:P CVSS BASE SCORE: 6.8 CVSS TEMPORAL SCORE: n/a CVSS ENVIRONMENTAL SCORE: n/a OVERALL RISK LEVEL: Moderate MITIGATION / WORKAROUNDS There is no specific mitigation for the vulnerabilities apart from updating the glibc version on the MSL platform. PATCH INFORMATION New releases of the MiVoice Businesss Express OVA (188.8.131.52 and 184.108.40.206) are available with the updated glibc package, providing fixes for the reported vulnerability. Customers should upgrade to MiVoice Business Express 220.127.116.11 and 18.104.22.168 as applicable. Please contact Product Support for more information. © Copyright 2016, Mitel Networks Corporation. All Rights Reserved. The Mitel word and logo are trademarks of Mitel Networks Corporation. Any reference to third party trademarks are for reference only and Mitel makes no representation of the ownership of these marks.