Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
EUVDB-ID: #VU64570
Risk: Medium
CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3929
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 22.03 LTS
qemu-seabios: before 6.2.0-41
qemu-help: before 6.2.0-41
qemu-guest-agent: before 6.2.0-41
qemu-block-rbd: before 6.2.0-41
qemu-block-curl: before 6.2.0-41
qemu-system-riscv: before 6.2.0-41
qemu-block-iscsi: before 6.2.0-41
qemu-img: before 6.2.0-41
qemu-hw-usb-host: before 6.2.0-41
qemu-system-arm: before 6.2.0-41
qemu-debugsource: before 6.2.0-41
qemu-debuginfo: before 6.2.0-41
qemu-system-aarch64: before 6.2.0-41
qemu-block-ssh: before 6.2.0-41
qemu-system-x86_64: before 6.2.0-41
qemu: before 6.2.0-41
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1733
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU69353
Risk: High
CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3750
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe 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.
Install updates from vendor's repository.
Vulnerable software versionsopenEuler: 22.03 LTS
qemu-seabios: before 6.2.0-41
qemu-help: before 6.2.0-41
qemu-guest-agent: before 6.2.0-41
qemu-block-rbd: before 6.2.0-41
qemu-block-curl: before 6.2.0-41
qemu-system-riscv: before 6.2.0-41
qemu-block-iscsi: before 6.2.0-41
qemu-img: before 6.2.0-41
qemu-hw-usb-host: before 6.2.0-41
qemu-system-arm: before 6.2.0-41
qemu-debugsource: before 6.2.0-41
qemu-debuginfo: before 6.2.0-41
qemu-system-aarch64: before 6.2.0-41
qemu-block-ssh: before 6.2.0-41
qemu-system-x86_64: before 6.2.0-41
qemu: before 6.2.0-41
External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1733
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.