CVE-2022-3643

 

Published at: - 07-12-2022 02:15

Last modified: - 10-01-2023 08:41

Total changes: - 5

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://xenbits.xenproject.org/xsa/advisory-423.txt
• [oss-security] 20221207 Xen Security Advisory 423 v2 (CVE-2022-3643) - Guests can trigger NIC interface reset/abort/crash via netback-Mailing List, Third Party Advisory
• [debian-lts-announce] 20221222 [SECURITY] [DLA 3244-1] linux-5.10 security update-Mailing List, Third Party Advisory
• [debian-lts-announce] 20221223 [SECURITY] [DLA 3245-1] linux security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2022-3643

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures