CVE ID:	CVE-2018-13405
Description:	The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.
Test IDs:	1.3.6.1.4.1.25623.1.1.2.2022.1475   1.3.6.1.4.1.25623.1.0.704266   1.3.6.1.4.1.25623.1.1.2.2022.1352   1.3.6.1.4.1.25623.1.1.2.2022.1466   1.3.6.1.4.1.25623.1.0.883034   1.3.6.1.4.1.25623.1.0.891466   1.3.6.1.4.1.25623.1.1.2.2022.1523
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2018-13405 BugTraq ID: 106503 http://www.securityfocus.com/bid/106503 Debian Security Information: DSA-4266 (Google Search) https://www.debian.org/security/2018/dsa-4266 https://www.exploit-db.com/exploits/45033/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTKKIAUMR5FAYLZ7HLEPOXMKAAE3BYBQ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HRBNBX73SAFKQWBOX76SLMWPTKJPVGEJ/ http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848c9c93c2c828ef4c3a8ca36ce46c7 http://openwall.com/lists/oss-security/2018/07/13/2 https://github.com/torvalds/linux/commit/0fa3ecd87848c9c93c2c828ef4c3a8ca36ce46c7 https://twitter.com/grsecurity/status/1015082951204327425 https://lists.debian.org/debian-lts-announce/2018/08/msg00014.html RedHat Security Advisories: RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948 RedHat Security Advisories: RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3083 RedHat Security Advisories: RHSA-2018:3096 https://access.redhat.com/errata/RHSA-2018:3096 RedHat Security Advisories: RHSA-2019:0717 https://access.redhat.com/errata/RHSA-2019:0717 RedHat Security Advisories: RHSA-2019:2476 https://access.redhat.com/errata/RHSA-2019:2476 RedHat Security Advisories: RHSA-2019:2566 https://access.redhat.com/errata/RHSA-2019:2566 RedHat Security Advisories: RHSA-2019:2696 https://access.redhat.com/errata/RHSA-2019:2696 RedHat Security Advisories: RHSA-2019:2730 https://access.redhat.com/errata/RHSA-2019:2730 RedHat Security Advisories: RHSA-2019:4159 https://access.redhat.com/errata/RHSA-2019:4159 RedHat Security Advisories: RHSA-2019:4164 https://access.redhat.com/errata/RHSA-2019:4164 https://usn.ubuntu.com/3752-1/ https://usn.ubuntu.com/3752-2/ https://usn.ubuntu.com/3752-3/ https://usn.ubuntu.com/3753-1/ https://usn.ubuntu.com/3753-2/ https://usn.ubuntu.com/3754-1/