Ubuntu update for linux



Published: 2022-02-18 | Updated: 2024-03-30
Risk Low
Patch available YES
Number of vulnerabilities 8
CVE-ID CVE-2021-22600
CVE-2021-39685
CVE-2021-4083
CVE-2021-4155
CVE-2021-4202
CVE-2021-43975
CVE-2022-0330
CVE-2022-22942
CWE-ID CWE-415
CWE-119
CWE-416
CWE-264
CWE-787
Exploitation vector Local
Public exploit Vulnerability #1 is being exploited in the wild.
Public exploit code for vulnerability #2 is available.
Vulnerability #8 is being exploited in the wild.
Vulnerable software
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Operating systems & Components / Operating system

linux-image-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-100-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-100-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem-osp1 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-100-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-virtual (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 8 vulnerabilities.

1) Double Free

EUVDB-ID: #VU63766

Risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-22600

CWE-ID: CWE-415 - Double Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error in the packet_set_ring() function in net/packet/af_packet.c. A local user can pass specially crafted data to the application, trigger double free error and escalate privileges on the system.

Note, the vulnerability is being actively exploited in the wild against Android users.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


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?

Yes. This vulnerability is being exploited in the wild.

2) Buffer overflow

EUVDB-ID: #VU61095

Risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-39685

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a malicious host to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the USB subsystem in Linux kernel. A malicious USB device can trigger memory corruption and execute arbitrary code on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

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.

3) Use-after-free

EUVDB-ID: #VU61246

Risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4083

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 within the Linux kernel's garbage collection for Unix domain socket file handlers. A local user can call close() and fget() simultaneously and can potentially trigger a race condition, which in turn leads to a use-after-free error and allows privilege escalation.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU59812

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4155

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to the OS kernel does not impose correctly security restrictions. A local user can gain access to sensitive information on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


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) Use-after-free

EUVDB-ID: #VU63764

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4202

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 nci_request() function in net/nfc/nci/core.c in NFC Controller Interface (NCI) in the Linux kernel. A local user can cause a data race problem while the device is getting removed and escalate privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Out-of-bounds write

EUVDB-ID: #VU62485

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-43975

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 within the hw_atl_utils_fw_rpc_wait() function in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c in Linux kernel. A local user can attach a specially crafted device to the system, trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Buffer overflow

EUVDB-ID: #VU60988

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-0330

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a random memory access flaw caused by a missing TLB flush in Linux kernel GPU i915 kernel driver functionality. A local user can execute arbitrary code on the system with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


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.

8) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU61217

Risk: Low

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-22942

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

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

The vulnerability exists due to an error in the vmwgfx driver in Linux kernel. A local unprivileged user can gain access to files opened by other processes on the system through a dangling 'file' pointer.

Exploiting this vulnerability requires an attacker to have access to either /dev/dri/card0 or /dev/dri/rendererD128 and be able to issue an ioctl() on the resulting file descriptor.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-lowlatency (Ubuntu package): before 5.4.0.100.104

linux-image-generic-lpae (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-generic (Ubuntu package): before 5.4.0-100.113

linux-image-5.4.0-100-generic-lpae (Ubuntu package): before 5.4.0-100.113

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.100.104

linux-image-5.4.0-100-lowlatency (Ubuntu package): before 5.4.0-100.113

linux-image-oem (Ubuntu package): before 5.4.0.100.104

linux-image-generic (Ubuntu package): before 5.4.0.100.104

linux-image-virtual (Ubuntu package): before 5.4.0.100.104

External links

http://ubuntu.com/security/notices/USN-5294-1


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?

Yes. This vulnerability is being exploited in the wild.



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