Huawei EulerOS: CVE-2018-1000204: kernel security update
Description
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.
Solution(s)
- huawei-euleros-2_0_sp2-upgrade-kernel
- huawei-euleros-2_0_sp2-upgrade-kernel-debug
- huawei-euleros-2_0_sp2-upgrade-kernel-debug-devel
- huawei-euleros-2_0_sp2-upgrade-kernel-debuginfo
- huawei-euleros-2_0_sp2-upgrade-kernel-debuginfo-common-x86_64
- huawei-euleros-2_0_sp2-upgrade-kernel-devel
- huawei-euleros-2_0_sp2-upgrade-kernel-headers
- huawei-euleros-2_0_sp2-upgrade-kernel-tools
- huawei-euleros-2_0_sp2-upgrade-kernel-tools-libs
- huawei-euleros-2_0_sp2-upgrade-perf
- huawei-euleros-2_0_sp2-upgrade-python-perf
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