VYPR
← All advisories
Unrated severityNVD Advisory· Published Jan 3, 2019· Updated Aug 4, 2024

CVE-2019-3701

CVE-2019-3701

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

146

Patches

Vulnerability mechanics

References

14

News mentions

0

No linked articles in our index yet.