(LiveHacking.Com) – As anticipated Microsoft has released 13 bulletins addressing 22 vulnerabilities in Microsoft Windows, Office, Internet Explorer, .NET and Visual Studio. Two of the updates (which Microsoft calls bulletins) are rated as critical:
- MS11-057 (Internet Explorer). This security update resolves five privately reported vulnerabilities and two publicly disclosed vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Versions 6, 7, 8 and 9 of Internet Explorer are affected.
- MS11-058 (DNS Server). This security update resolves two privately reported vulnerabilities in Windows DNS server. The more severe of these vulnerabilities could allow remote code execution if an attacker sends a specially crafted Naming Authority Pointer (NAPTR) query to a DNS server. Servers that do not have the DNS role enabled are not at risk.
- MS11-064 (Vulnerabilities in TCP/IP Stack Could Allow Denial of Service). This security update resolves two privately reported vulnerabilities in Microsoft Windows. The vulnerabilities could allow denial of service if an attacker sends a sequence of specially crafted Internet Control Message Protocol (ICMP) messages to a target system or sends a specially crafted URL request to a server that is serving Web content and has the URL-based Quality of Service (QoS) feature enabled.