SB2023092115 - SUSE update for qemu
Published: September 21, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 10 secuirty vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2020-13754)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in hw/pci/msix.c. A local user on the guest operating system can send specially crafted address in an msi-x mmio operation, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code.
2) Out-of-bounds write (CVE-ID: CVE-2021-3638)
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the ATI VGA device emulation of QEMU within the ati_2d_blt() routine while handling MMIO write operations. A malicious guest can crash the QEMU process on the host.
3) Use-after-free (CVE-ID: CVE-2021-3750)
The vulnerability allows a remote user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the USB EHCI controller emulation of QEMU. A remote guest can trigger a use-after-free error and execute arbitrary code on the host OS.
4) Use-after-free (CVE-ID: CVE-2021-3929)
The vulnerability allows a remote user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the NVM Express Controller emulation in QEMU within the dma_buf_write() and dma_buf_read() function in hw/nvme/ctrl.c:nvme_tx(). A remote privileged user on the guest OS can trigger a use-after-free error and execute arbitrary code on the QEMU host.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
5) Use-after-free (CVE-ID: CVE-2022-1050)
The vulnerability allows a malicious guest to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the QEMU implementation of VMWare's paravirtual RDMA device. A specially crafted driver on a malicious guest can execute HW commands when shared buffers are not yet allocated, trigger a use-after-free error and execute arbitrary code on the QEMU host.
6) Improper Resource Shutdown or Release (CVE-ID: CVE-2022-26354)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists in the vhost-vsock device of QEMU. A local user can trigger the error and gain access to sensitive information.
7) Out-of-bounds write (CVE-ID: CVE-2023-0330)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within hw/scsi/lsi53c895a.c in QEMU caused by a DMA-MMIO reentrancy problem. A local privileged user can trigger an out-of-bounds write and execute arbitrary code on the target system.
8) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-2861)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an error in the 9p passthrough filesystem (9pfs) implementation in QEMU. A local user can escape from the exported 9p tree by creating and opening a device file in the shared folder.
9) Out-of-bounds write (CVE-ID: CVE-2023-3180)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the virtio_crypto_handle_sym_req() function in hw/virtio/virtio-crypto.c of the QEMU virtual crypto device when handling data encryption/decryption requests. A local user trigger an out-of-bounds write and perform a denial of service 9DoS) attack.
10) NULL pointer dereference (CVE-ID: CVE-2023-3354)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in NULL pointer dereference and denial of service.
Remediation
Install update from vendor's website.