ALT-PU-2019-1121-1

Package update kernel-image-un-def in branch p8

Version4.14.95-alt0.M80P.1

Published2019-01-25

Max severityMEDIUM

Severity:

Closed issues (2)

MEDIUM4.4

Уязвимость в функции can_can_gw_rcv in net/can/gw.c ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2020-03-04Modified: 2024-12-03

CVSS 3.xMEDIUM 4.4

CVSS:3.x/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0MEDIUM 4.9

CVSS:2.0/AV:L/AC:L/Au:N/C:N/I:N/A:C

References

CVE-2019-3701

MEDIUM4.4

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.

Published: 2019-01-03Modified: 2024-11-21

CVSS 2.0MEDIUM 4.9

CVSS:2.0/AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS 3.xMEDIUM 4.4

CVSS:3.x/CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References