Multiple vulnerabilities in Red Hat Virtualization



| Updated: 2024-02-08
Risk Medium
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2021-3621
CVE-2021-3715
CVE-2021-22555
CVE-2021-32399
CVE-2021-31535
CWE-ID CWE-77
CWE-416
CWE-787
CWE-362
CWE-20
Exploitation vector Local
Public exploit Vulnerability #3 is being exploited in the wild.
Public exploit code for vulnerability #5 is available.
Vulnerable software
 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 5 vulnerabilities.

1) Command Injection

EUVDB-ID: #VU56000

Risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3621

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper input validation in the sssctl command within the logs-fetch and cache-expire subcommands. An attacker can trick the root user into running a specially crafted sssctl command, such as via sudo, and execute arbitrary code with root privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

redhat-virtualization-host (Red Hat package): 4.3.11-20200922.0.el7_9 - 4.3.17-20210713.0.el7_9

redhat-release-virtualization-host (Red Hat package): 4.3.4-1.el7ev - 4.3.17-1.el7ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2021:3477


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) Use-after-free

EUVDB-ID: #VU56393

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3715

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem (route4_change() function in net/sched/cls_route.c) in the way it handled changing of classification filters. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

redhat-virtualization-host (Red Hat package): 4.3.11-20200922.0.el7_9 - 4.3.17-20210713.0.el7_9

redhat-release-virtualization-host (Red Hat package): 4.3.4-1.el7ev - 4.3.17-1.el7ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2021:3477


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) Out-of-bounds write

EUVDB-ID: #VU56017

Risk: Low

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2021-22555

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when processing untrusted input in net/netfilter/x_tables.c in Linux kernel. A local user can run a specially crafted program to trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

redhat-virtualization-host (Red Hat package): 4.3.11-20200922.0.el7_9 - 4.3.17-20210713.0.el7_9

redhat-release-virtualization-host (Red Hat package): 4.3.4-1.el7ev - 4.3.17-1.el7ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2021:3477


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) Race condition

EUVDB-ID: #VU55257

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32399

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition  for removal of the HCI controller within net/bluetooth/hci_request.c in the Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

redhat-virtualization-host (Red Hat package): 4.3.11-20200922.0.el7_9 - 4.3.17-20210713.0.el7_9

redhat-release-virtualization-host (Red Hat package): 4.3.4-1.el7ev - 4.3.17-1.el7ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2021:3477


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) Input validation error

EUVDB-ID: #VU53336

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2021-31535

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of color names within the XLookupColor() function. A local user can run a specially crafted application on the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

redhat-virtualization-host (Red Hat package): 4.3.11-20200922.0.el7_9 - 4.3.17-20210713.0.el7_9

redhat-release-virtualization-host (Red Hat package): 4.3.4-1.el7ev - 4.3.17-1.el7ev

Red Hat Virtualization Host: 4

Red Hat Virtualization: 4

CPE2.3 External links

https://access.redhat.com/errata/RHSA-2021:3477


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.



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