Ubuntu Security Notice 5675-1 - Isaac Boukris and Andrew Bartlett discovered that Heimdal's KDC was not properly performing checksum algorithm verifications in the S4U2Self extension module. An attacker could possibly use this issue to perform a machine-in-the-middle attack and request S4U2Self tickets for any user known by the application. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. It was discovered that Heimdal was not properly handling the verification of key exchanges when an anonymous PKINIT was being used. An attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS.
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Gentoo Linux Security Advisory 202003-52 - Multiple vulnerabilities have been found in Samba, the worst of which could lead to remote code execution. Versions less than 4.11.6 are affected.
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Apple Security Advisory 2019-8-13-4 - tvOS 12.4 addresses code execution, cross site scripting, and use-after-free vulnerabilities.
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Apple Security Advisory 2019-8-13-3 - watchOS 5.3 addresses code execution, cross site scripting, denial of service, and use-after-free vulnerabilities.
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Apple Security Advisory 2019-8-13-2 - iOS 12.4 addresses code execution, cross site scripting, denial of service, and use-after-free vulnerabilities.
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Apple Security Advisory 2019-8-13-1 - Additional information for APPLE-SA-2019-7-22-2 macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra.
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Apple Security Advisory 2019-7-22-5 - tvOS 12.4 is now available and addresses code execution, cross site scripting, and use-after-free vulnerabilities.
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Apple Security Advisory 2019-7-22-2 - macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra are now available and address bypass, code execution, and use-after-free vulnerabilities.
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Apple Security Advisory 2019-7-22-4 - watchOS 5.3 is now available and addresses code execution, cross site scripting, denial of service, and use-after-free vulnerabilities.
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Apple Security Advisory 2019-7-22-1 - iOS 12.4 is now available and addresses code execution, cross site scripting, denial of service, and use-after-free vulnerabilities.
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Debian Linux Security Advisory 4455-1 - Several vulnerabilities were discovered in Heimdal, an implementation of Kerberos 5 that aims to be compatible with MIT Kerberos.
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Debian Linux Security Advisory 4443-1 - Isaac Boukris and Andrew Bartlett discovered that the S4U2Self Kerberos extension used in Samba's Active Directory support was susceptible to man-in-the-middle attacks caused by incomplete checksum validation.
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Ubuntu Security Notice 3976-2 - USN-3976-1 fixed a vulnerability in Samba. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges. Various other issues were also addressed.
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Ubuntu Security Notice 3976-1 - Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges.
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