CVE ID:	CVE-2018-1000204
Description:	** DISPUTED ** Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel heap pages to the userspace. This has been fixed upstream in https://github .com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. NOTE: third parties dispute the relevance of this report, noting that the requirement for an attacker to have both the CAP_SYS_ADMIN and CAP_SYS_RAWIO capabilities makes it "virtually impossible to exploit."
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2018-1000204 http://www.openwall.com/lists/oss-security/2018/06/26/3 https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html RedHat Security Advisories: RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948 SuSE Security Announcement: openSUSE-SU-2019:1407 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html https://usn.ubuntu.com/3696-1/ https://usn.ubuntu.com/3696-2/ https://usn.ubuntu.com/3752-1/ https://usn.ubuntu.com/3752-2/ https://usn.ubuntu.com/3752-3/ https://usn.ubuntu.com/3754-1/