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CVE-2022-3643

Public on 2022-12-07
Modified on 2024-01-14
Description

Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It appears to be an (unwritten?) assumption in the rest of the Linux network stack that packet protocol headers are all contained within the linear section of the SKB and some NICs behave badly if this is not the case. This has been reported to occur with Cisco (enic) and Broadcom NetXtrem II BCM5780 (bnx2x) though it may be an issue with other NICs/drivers as well. In case the frontend is sending requests with split headers, netback will forward those violating above mentioned assumption to the networking core, resulting in said misbehavior.

Severity
Medium
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CVSS v3 Base Score
6.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2023-03-17 15:53 ALAS-2023-1706
Amazon Linux 2 - Core kernel 2023-02-03 19:19 ALAS2-2023-1932
Amazon Linux 2 - Kernel-5.10 Extra kernel 2023-01-18 00:24 ALAS2KERNEL-5.10-2023-025
Amazon Linux 2 - Kernel-5.15 Extra kernel 2023-01-18 00:24 ALAS2KERNEL-5.15-2023-012
Amazon Linux 2 - Kernel-5.4 Extra kernel 2023-01-18 00:25 ALAS2KERNEL-5.4-2023-041
Amazon Linux 2023 kernel 2023-02-17 20:46 ALAS2023-2023-070

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.5 AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:X/RL:O/RC:C
NVD CVSSv3 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H