SB2022102676 - SUSE update for qemu
Published: October 26, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Heap-based buffer overflow (CVE-ID: CVE-2020-17380)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the SDHCI device emulation support while performing a multi block SDMA transfer via the sdhci_sdma_transfer_multi_blocks() routine in hw/sd/sdhci.c. A remote user of the guest OS can trigger a heap-based buffer overflow and crash the QEMU process on the host OS.
2) Heap-based buffer overflow (CVE-ID: CVE-2020-25085)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the flatview_read_continue in exec.c because hw/sd/sdhci.c mishandles a write operation in the SDHC_BLKSIZE case. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Out-of-bounds write (CVE-ID: CVE-2021-3409)
The vulnerability allows a remote user to compromise vulnerable system.
The vulnerability exists due to a boundary error in the SDHCI controller emulation code. A remote user on the guest OS can trigger an out-of-bounds write and execute arbitrary code on QEMU host.
4) Heap-based buffer overflow (CVE-ID: CVE-2021-3507)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the fdctrl_transfer_handler() function in hw/block/fdc.c while processing DMA read
data transfers from the floppy drive to the guest system. A remote privileged user on the guest OS can trigger a heap-based buffer overflow and crash the QEMU process on the host OS.
5) Integer overflow (CVE-ID: CVE-2021-4206)
The vulnerability allows a local user to escalate privileges on the target system.
The vulnerability exists due to integer overflow in the cursor_alloc() function in the QXL display device emulation in QEMU. A privileged user can crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
6) Race condition (CVE-ID: CVE-2021-4207)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in the QXL display device emulation in QEMU. A privileged user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
7) Use-after-free (CVE-ID: CVE-2022-0216)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error in the LSI53C895A SCSI Host Bus Adapter emulation of QEMU when processing repeated messages to cancel the current SCSI request via the lsi_do_msgout() function. A remote user on the guest OS can trigger a use-after-free error and perform a denial of service attack against the QEMU host.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Install update from vendor's website.