Debian update for qemu
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2021-4206 CVE-2021-4207 CVE-2022-0358 CVE-2022-26353 CVE-2022-26354 |
| CWE-ID | CWE-190 CWE-362 CWE-276 CWE-416 CWE-404 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software |
Debian Linux Operating systems & Components / Operating system qemu (Debian package) Operating systems & Components / Operating system package or component |
| Vendor | Debian |
Security Bulletin
This security bulletin contains information about 5 vulnerabilities.
1) Integer overflow
EUVDB-ID: #VU63787
Risk: Low
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-4206
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe 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.
MitigationUpdate qemu package to version 1:5.2+dfsg-11+deb11u2.
Vulnerable software versionsDebian Linux: All versions
qemu (Debian package): before 1:5.2+dfsg-11+deb11u2
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:qemu_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2022/dsa-5133
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Race condition
EUVDB-ID: #VU63788
Risk: Low
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-4207
Exploit availability: No
DescriptionThe 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.
MitigationUpdate qemu package to version 1:5.2+dfsg-11+deb11u2.
Vulnerable software versionsDebian Linux: All versions
qemu (Debian package): before 1:5.2+dfsg-11+deb11u2
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:qemu_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2022/dsa-5133
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Incorrect default permissions
EUVDB-ID: #VU61492
Risk: Low
CVSSv4.0: 5.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-0358
CWE-ID:
CWE-276 - Incorrect Default Permissions
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect QEMU virtio-fs shared file system daemon (virtiofsd) implementation. An attacker on the guest OS can create files in the directories shared by virtio-fs with unintended group ownership in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of the group. This can lead to privilege escalation within the guest OS.
The vulnerability exists due to incomplete fox for #VU13631 (CVE-2018-13405).
Update qemu package to version 1:5.2+dfsg-11+deb11u2.
Vulnerable software versionsDebian Linux: All versions
qemu (Debian package): before 1:5.2+dfsg-11+deb11u2
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:qemu_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2022/dsa-5133
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Use-after-free
EUVDB-ID: #VU63783
Risk: Low
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-26353
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the virtio-net device of QEMU. A privileged user can exploit this issue to crash QEMU or potentially execute arbitrary code with elevated privileges.
MitigationUpdate qemu package to version 1:5.2+dfsg-11+deb11u2.
Vulnerable software versionsDebian Linux: All versions
qemu (Debian package): before 1:5.2+dfsg-11+deb11u2
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:qemu_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2022/dsa-5133
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
5) Improper Resource Shutdown or Release
EUVDB-ID: #VU63786
Risk: Low
CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-26354
CWE-ID:
CWE-404 - Improper Resource Shutdown or Release
Exploit availability: No
DescriptionThe 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.
MitigationUpdate qemu package to version 1:5.2+dfsg-11+deb11u2.
Vulnerable software versionsDebian Linux: All versions
qemu (Debian package): before 1:5.2+dfsg-11+deb11u2
CPE2.3- cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:qemu_debian_package:*:*:*:*:*:debian_linux:*:*
https://www.debian.org/security/2022/dsa-5133
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
