openEuler update for qemu
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-3748 |
| CWE-ID | CWE-416 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software |
openEuler Operating systems & Components / Operating system qemu-seabios Operating systems & Components / Operating system package or component qemu-help Operating systems & Components / Operating system package or component qemu-img Operating systems & Components / Operating system package or component qemu-debuginfo Operating systems & Components / Operating system package or component qemu-block-curl Operating systems & Components / Operating system package or component qemu-guest-agent Operating systems & Components / Operating system package or component qemu-block-ssh Operating systems & Components / Operating system package or component qemu-block-iscsi Operating systems & Components / Operating system package or component qemu-block-rbd Operating systems & Components / Operating system package or component qemu-debugsource Operating systems & Components / Operating system package or component qemu Operating systems & Components / Operating system package or component |
| Vendor | openEuler |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Use-after-free
EUVDB-ID: #VU58813
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2021-3748
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote guest to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when in the virtio-net device of QEMU. A malicious guest can trigger the use-after-free error and execute arbitrary code on the host system with QEMU privileges.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1 - 20.03 LTS SP2
qemu-seabios: before 4.1.0-57
qemu-help: before 4.1.0-57
qemu-img: before 4.1.0-57
qemu-debuginfo: before 4.1.0-57
qemu-block-curl: before 4.1.0-57
qemu-guest-agent: before 4.1.0-57
qemu-block-ssh: before 4.1.0-57
qemu-block-iscsi: before 4.1.0-57
qemu-block-rbd: before 4.1.0-57
qemu-debugsource: before 4.1.0-57
qemu: before 4.1.0-57
CPE2.3- cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
- cpe:2.3:o:openeuler:openeuler:20.03:LTS SP2:*:*:*:*:*:*
- cpe:2.3:o:openeuler:qemu-seabios:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-help:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-img:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-block-curl:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-guest-agent:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-block-ssh:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-block-iscsi:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-block-rbd:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu-debugsource:*:*:*:*:*:openeuler:*:*
- cpe:2.3:o:openeuler:qemu:*:*:*:*:*:openeuler:*:*
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1371
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
