CVE-2022-3643

NameCVE-2022-3643
DescriptionGuests 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3244-1, DLA-3245-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.249-2vulnerable
buster (security)4.19.269-1fixed
bullseye5.10.158-2fixed
bullseye (security)5.10.162-1fixed
bookworm6.1.7-1fixed
sid6.1.8-1fixed
linux-5.10 (PTS)buster (security)5.10.158-2~deb10u1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcebuster4.19.269-1DLA-3245-1
linuxsourcebullseye5.10.158-1
linuxsource(unstable)6.1.4-1
linux-5.10sourcebuster5.10.158-2~deb10u1DLA-3244-1

Notes

https://xenbits.xen.org/xsa/advisory-423.html
https://git.kernel.org/linus/ad7f402ae4f466647c3a669b8a6f3e5d4271c84a

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