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CVE-2019-3701 PUBLISHED

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.

EPSS 0.06% · 17.5th percentile

Risk Scores

EPSS Score
0.06%
17.5th percentile

Affected Products

VendorProductVersions
Ubuntu:18.04:LTSlinux-hwe4.18.0-20.21~18.04.1, 4.18.0-21.22~18.04.1, 4.18.0-22.23~18.04.1
Ubuntu:20.04:LTSlinux-gke5.4.0-1091.98, 5.4.0-1090.97, 5.4.0-1087.94
Ubuntu:18.04:LTSlinux-snapdragon4.15.0-1060.66, 0, 4.4.0-1077.82
Ubuntu:Pro:FIPS:18.04:LTSlinux-azure-fips0, 4.15.0-1002.2
Ubuntu:16.04:LTSlinux4.4.0-140.166, 4.4.0-38.57, 4.4.0-42.62
Ubuntu:24.04:LTSlinux-raspi-realtime0, 6.8.0-2019.20
Ubuntu:20.04:LTSlinux-azure-fde5.4.0-1073.76+cvm1.1, 5.4.0-1072.75+cvm1.1, 5.4.0-1070.73+cvm1.1
Ubuntu:16.04:LTSlinux-kvm4.4.0-1031.37, 0, 4.4.0-1004.9
Ubuntu:Pro:14.04:LTSlinux3.13.0-192.243, 0, 3.11.0-12.19
Ubuntu:Pro:FIPS-updates:18.04:LTSlinux-azure-fips4.15.0-1002.2, 0
Ubuntu:22.04:LTSlinux-realtime0, 5.15.0-1032.35
Ubuntu:16.04:LTSlinux-azure4.15.0-1022.22~16.04.1, 4.15.0-1023.24~16.04.1, 4.15.0-1025.26~16.04.1
Ubuntu:16.04:LTSlinux-raspi24.4.0-1021.27, 4.4.0-1019.25, 4.4.0-1017.23
Ubuntu:Pro:FIPS-updates:18.04:LTSlinux-aws-fips4.15.0-2000.4, 0
Ubuntu:14.04:LTSlinux-aws4.4.0-1014.14, 4.4.0-1012.12, 4.4.0-1011.11
Ubuntu:16.04:LTSlinux-snapdragon4.4.0-1020.23, 0, 4.4.0-1012.12
Ubuntu:18.04:LTSlinux-azure4.15.0-1003.3, 4.15.0-1004.4, 4.15.0-1008.8
Ubuntu:14.04:LTSlinux-lts-xenial4.4.0-28.47~14.04.1, 4.4.0-96.119~14.04.1, 4.4.0-97.120~14.04.1
Ubuntu:18.04:LTSlinux-aws4.15.0-1017.17, 0, 4.15.0-1005.5
Ubuntu:16.04:LTSlinux-gcp4.10.0-1009.9, 4.15.0-1017.18~16.04.1, 4.15.0-1030.32~16.04.1

…and 18 more

Timeline

References

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