Huawei EulerOS: CVE-2019-3701: kernel security update
Description
An issue was discovered in can_can_gw_rcv in net/can/gw.c in the Linux kernel through 4.19.13. The CAN frame modification rules allow bitwise logical operations that can be also applied to the can_dlc field. The privileged user "root" with CAP_NET_ADMIN can create a CAN frame modification rule that makes the data length code a higher value than the available CAN frame data size. In combination with a configured checksum calculation where the result is stored relatively to the end of the data (e.g. cgw_csum_xor_rel) the tail of the skb (e.g. frag_list pointer in skb_shared_info) can be rewritten which finally can cause a system crash. Because of a missing check, the CAN drivers may write arbitrary content beyond the data registers in the CAN controller's I/O memory when processing can-gw manipulated outgoing frames.
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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