2024-10-29 security advisory backports #2244
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Reported by: Milosz Kaniewski <[email protected]> (cherry picked from commit 7f4731a)
Several functions did not validate the slot index resulting in OOB read on the heap of the slot device structure which could lead to arbitrary reads/writes and potentially code execution. Reported by: Synacktiv Reviewed by: markj (earlier), jhb Security: CVE-2024-41721 Security: HYP-02 Sponsored by: The Alpha-Omega Project Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D45996 (cherry picked from commit e72d86a)
In the functions pci_nvme_handle_admin_cmd and pci_nvme_handle_io_cmd infinite loops are possible in the bhyve process if the sq->tail value is greater than sq->size. An attacker could overload the host CPU. Fix is to validate that doorbell values: - Are for a valid (i.e., created) queue - Are not the same as the previous value - Fit within the available capacity The emulation will generate an Asynchronous Event Notification (Invalid Doorbell or Invalid Doorbell Value) if enabled and ignore the doorbell update. While in the neighborhood, remove a redundant bounds check. Reported by: Synacktiv MFC after: 1 week Security: HYP-14 Sponsored by: Alpha-Omega Project Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D46064 (cherry picked from commit 5374b9e)
The virtio_scsi device allows a VM guest to directly send SCSI commands (ctsio->cdb array) to the kernel driver exposed on /dev/cam/ctl (ctl.ko). All kernel commands accessible from the guest are defined by ctl_cmd_table. The command ctl_persistent_reserve_out (cdb[0]=0x5F and cbd[1]=0) allows the caller to call malloc() with an arbitrary size (uint32_t). This can be used by the guest to overload the kernel memory (DOS attack). Reported by: Synacktiv Reviewed by: asomers Security: HYP-08 Sponsored by: The Alpha-Omega Project Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D46044 (cherry picked from commit 64b0f52)
Reviewed by: grembo MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D46973 (cherry picked from commit 1d7a338)
bsdjhb
approved these changes
Nov 11, 2024
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2024-09-19 and 2024-10-29 security updates. Nothing seems critical, but might as well pull them in case we don't catch up if we decide to do an interim release.