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[email protected]NVD:CVE-2023-0045

HistoryApr 25, 2023 - 11:15 p.m.

CVE-2023-0045

2023-04-2523:15:09

CWE-610

[email protected]

web.nvd.nist.gov

prctl syscall

ibpb

vulnerability

kernel 4.9.176

conditional mitigation

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

Confidence

High

EPSS

0.002

Percentile

61.1%

JSON

The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176.

We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96

Affected configurations

Nvd

Node

linuxlinux_kernelRange3.16.68–3.17

linuxlinux_kernelRange4.4.180–4.5

linuxlinux_kernelRange4.9.176–4.10

linuxlinux_kernelRange4.14.86–4.14.303

linuxlinux_kernelRange4.19.7–4.19.270

linuxlinux_kernelRange4.20–5.4.229

linuxlinux_kernelRange5.5.0–5.10.163

linuxlinux_kernelRange5.11–5.15.87

linuxlinux_kernelRange5.16–6.0.19

linuxlinux_kernelRange6.1–6.1.5

Node

debiandebian_linuxMatch10.0

Node

netappactive_iq_unified_managerMatch-vmware_vsphere

Node

netapph300sMatch-

AND

netapph300s_firmwareMatch-

Node

netapph500sMatch-

AND

netapph500s_firmwareMatch-

Node

netapph700sMatch-

AND

netapph700s_firmwareMatch-

Node

netapph410sMatch-

AND

netapph410s_firmwareMatch-

Node

netapph410c_firmwareMatch-

AND

netapph410cMatch-

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
debiandebian_linux10.0cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
netappactive_iq_unified_manager-cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
netapph300s-cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
netapph300s_firmware-cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
netapph500s-cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*
netapph500s_firmware-cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
netapph700s-cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*
netapph700s_firmware-cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
netapph410s-cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*
netapp	active_iq_unified_manager	-	cpe:2.3:a:netapp:active_iq_unified_manager:-:::::vmware_vsphere::
netapp	h300s	-	cpe:2.3:h:netapp:h300s:-:::::::*
netapp	h300s_firmware	-	cpe:2.3:o:netapp:h300s_firmware:-:::::::*
netapp	h500s	-	cpe:2.3:h:netapp:h500s:-:::::::*
netapp	h500s_firmware	-	cpe:2.3:o:netapp:h500s_firmware:-:::::::*
netapp	h700s	-	cpe:2.3:h:netapp:h700s:-:::::::*
netapp	h700s_firmware	-	cpe:2.3:o:netapp:h700s_firmware:-:::::::*
netapp	h410s	-	cpe:2.3:h:netapp:h410s:-:::::::*