Ubuntu Security Notice 4976-2 - USN-4976-1 fixed a vulnerability in Dnsmasq. This update provides the corresponding update for Ubuntu 16.04 ESM. Dnsmasq has been updated to 2.79-1 for Ubuntu 16.04 ESM in order to fix some security issues. Petr Mensik discovered that Dnsmasq incorrectly randomized source ports in certain configurations. A remote attacker could possibly use this issue to facilitate DNS cache poisoning attacks.
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The user profile service, identified as ProfSrv, is vulnerable to a local privilege elevation vulnerability in its CreateDirectoryJunction() function due to a lack of appropriate checks on the directory structure of the junctions it tries to link together. Attackers can leverage this vulnerability to plant a malicious DLL in a system directory and then trigger a UAC prompt to cause this DLL to be loaded and executed by ProfSrv as the NT AUTHORITY\SYSTEM user. Note that this bug was originally identified as CVE-2021-34484 and was subsequently patched a second time as CVE-2022-21919, however both patches were found to be insufficient. This bug is a patch bypass for CVE-2022-21919 and at the time of publishing, has not yet been patched, though plans are in place to patch it as CVE-2022-26904.
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Red Hat Security Advisory 2021-4153-02 - The dnsmasq packages contain Dnsmasq, a lightweight DNS forwarder and DHCP server.
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Internet Explorer suffers from an issue where incorrect JIT optimization in jscript9.dll leads to memory corruption.
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Red Hat Security Advisory 2021-3148-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address security vulnerabilities are now available. The updated versions are .NET SDK 5.0.206 and .NET Runtime 5.0.9. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2021-3147-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address security vulnerabilities are now available. The updated versions are .NET SDK 5.0.206 and .NET Runtime 5.0.9. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2021-3145-01 - .NET Core is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET Core that address a security vulnerability are now available. The updated versions are .NET Core SDK 2.1.525 and .NET Core Runtime 2.1.29.
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Red Hat Security Advisory 2021-3143-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address security vulnerabilities are now available. The updated versions are .NET SDK 3.1.118 and .NET Runtime 3.1.18. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2021-3144-01 - .NET Core is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET Core that address a security vulnerability are now available. The updated versions are .NET Core SDK 2.1.525 and .NET Core Runtime 2.1.29.
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Red Hat Security Advisory 2021-3142-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address security vulnerabilities are now available. The updated versions are .NET SDK 3.1.118 and .NET Runtime 3.1.18. Issues addressed include a denial of service vulnerability.
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Ubuntu Security Notice 4976-1 - Petr Mensik discovered that Dnsmasq incorrectly randomized source ports in certain configurations. A remote attacker could possibly use this issue to facilitate DNS cache poisoning attacks.
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Gentoo Linux Security Advisory 202105-20 - Use of insufficient randomness in Dnsmasq might lead to DNS Cache Poisoning. Versions less than 2.85 are affected.
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