CVE-2022-3643
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.
Does this matter?
Lower severity and a low EPSS score (0.46%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- EPSS
- 0.46% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- linux/linux kernel · debian/debian linux
- Source
- security@xen.org
References
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- http://www.openwall.com/lists/oss-security/2022/12/07/2Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00031.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00034.htmlMailing List, Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-423.txtVendor Advisory
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- http://www.openwall.com/lists/oss-security/2022/12/07/2Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00031.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00034.htmlMailing List, Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-423.txtVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.