SB2023080425 - SUSE update for qemu
Published: August 4, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) 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.
2) 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.
3) Infinite loop (CVE-ID: CVE-2023-3255)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the vnc_client_cut_text_ext function in ui/vnc-clipboard.c. A remote authenticated client who is able to send a clipboard to the QEMU built-in VNC server can perform a denial of service conditions.
4) Reachable Assertion (CVE-ID: CVE-2023-3301)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion. When a peer nic is still attached to the vdpa backend, it is too early to free up the vhost-net and vdpa structures. If these structures are freed here, then QEMU crashes when the guest is being shut down.
Remediation
Install update from vendor's website.