Red Hat Virtualization Host security update for ovirt
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2020-24489 CVE-2021-3501 CVE-2021-3560 CVE-2021-27219 |
| CWE-ID | CWE-459 CWE-787 CWE-264 CWE-190 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #3 is being exploited in the wild. |
| Vulnerable software Subscribe |
redhat-virtualization-host (Red Hat package) Operating systems & Components / Operating system package or component redhat-release-virtualization-host (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Virtualization Host Web applications / Remote management & hosting panels Red Hat Virtualization Server applications / Virtualization software |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Incomplete cleanup
EUVDB-ID: #VU54191
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-24489
CWE-ID:
CWE-459 - Incomplete cleanup
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incomplete cleanup, which leads to security restrictions bypass and privilege escalation.
MitigationInstall updates from vendor's website.
redhat-virtualization-host (Red Hat package): 4.4.6-20210527.3.el8_4
redhat-release-virtualization-host (Red Hat package): 4.4.6-1.el8ev
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
External linkshttp://access.redhat.com/errata/RHSA-2021:2522
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) Out-of-bounds write
EUVDB-ID: #VU54316
Risk: Low
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3501
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
Description The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the KVM API in Linux kernel. A local user can run a specially crafted program to trigger an out-of-bounds write and escalate privileges on the system.
Install updates from vendor's website.
redhat-virtualization-host (Red Hat package): 4.4.6-20210527.3.el8_4
redhat-release-virtualization-host (Red Hat package): 4.4.6-1.el8ev
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
External linkshttp://access.redhat.com/errata/RHSA-2021:2522
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU53837
Risk: Low
CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2021-3560
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions in the "polkit_system_bus_name_get_creds_sync" function, which leads to security restrictions bypass and privilege escalation.
MitigationInstall updates from vendor's website.
redhat-virtualization-host (Red Hat package): 4.4.6-20210527.3.el8_4
redhat-release-virtualization-host (Red Hat package): 4.4.6-1.el8ev
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
External linkshttp://access.redhat.com/errata/RHSA-2021:2522
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. However, proof of concept for this vulnerability is available.
4) Integer overflow
EUVDB-ID: #VU51456
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-27219
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer overflow within the g_bytes_new() function on 64-bit platforms due to an implicit cast from 64 bits to 32 bits. A local user can run a specially crafted program to trigger an integer overflow and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
redhat-virtualization-host (Red Hat package): 4.4.6-20210527.3.el8_4
redhat-release-virtualization-host (Red Hat package): 4.4.6-1.el8ev
Red Hat Virtualization Host: 4
Red Hat Virtualization: 4
External linkshttp://access.redhat.com/errata/RHSA-2021:2522
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.
