Ubuntu update for linux-azure



Published: 2022-07-29 | Updated: 2023-06-18
Risk Low
Patch available YES
Number of vulnerabilities 11
CVE-ID CVE-2021-4197
CVE-2022-1011
CVE-2022-1198
CVE-2022-1199
CVE-2022-1204
CVE-2022-1205
CVE-2022-1353
CVE-2022-1516
CVE-2022-2380
CVE-2022-28388
CVE-2022-28389
CWE-ID CWE-264
CWE-416
CWE-476
CWE-200
CWE-125
CWE-415
Exploitation vector Local
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
Subscribe 		Ubuntu
Operating systems & Components / Operating system

linux-image-4.15.0-1146-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

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

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 11 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU61258

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-2021-4197

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

Exploit availability: No

Description

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

The vulnerability exists due to missing permissions checks within the cgroups (control groups) functionality of Linux Kernel when writing into a file descriptor. A local low privileged process can trick a higher privileged parent process into writing arbitrary data into files, which can result in denial of service or privileges escalation.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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.

2) Use-after-free

EUVDB-ID: #VU63386

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-2022-1011

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

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 write() function of FUSE filesystem. A local user can retireve (partial) /etc/shadow hashes and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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. However, proof of concept for this vulnerability is available.

3) Use-after-free

EUVDB-ID: #VU63431

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1198

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the drivers/net/hamradio/6pack.c. A local user can perform a denial of service (DoS) attack by simulating Amateur Radio.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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) NULL pointer dereference

EUVDB-ID: #VU63432

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1199

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a Null pointer dereference and use after free errors in the ax25_release() function. A local user can simulate Amateur Radio and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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: #VU63791

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-2022-1204

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 Linux kernel’s Amateur Radio AX.25 protocol functionality when user connects with the protocol. A local user can trigger use-after-free error to perform a denial of service attack or escalate privileges on the system.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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.

6) NULL pointer dereference

EUVDB-ID: #VU63433

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1205

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a null pointer dereference and use after free errors in the net/ax25/ax25_timer.c. A local user can simulate Amateur Radio and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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.

7) Information disclosure

EUVDB-ID: #VU63388

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1353

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the pfkey_register function in net/key/af_key.c in the Linux kernel. A local user can gain unauthorized access to kernel memory, leading to a system crash or a leak of internal kernel information.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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) NULL pointer dereference

EUVDB-ID: #VU63158

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1516

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to NULL pointer dereference error in the Linux kernel’s X.25 set of standardized network protocols functionality. A local user can terminate session using a simulated Ethernet card and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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.

9) Out-of-bounds read

EUVDB-ID: #VU65288

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-2380

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition in the Linux kernel framebuffer within the drivers/video/fbdev/sm712fb.c:smtcfb_read() function. A local user can trigger ab out-of-bounds read error and crash the system.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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.

10) Double Free

EUVDB-ID: #VU63160

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-2022-28388

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code with elevated privileges.

The vulnerability exists due to boundary error in the usb_8dev_start_xmit in drivers/net/can/usb/usb_8dev.c. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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.

11) Double Free

EUVDB-ID: #VU63162

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-2022-28389

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code with elevated privileges.

The vulnerability exists due to boundary error in mcba_usb_start_xmit in drivers/net/can/usb/mcba_usb.c. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-azure to the latest version.

Vulnerable software versions

Ubuntu: 16.04

linux-image-4.15.0-1146-azure (Ubuntu package): before 4.15.0.1146.133

linux-image-azure (Ubuntu package): before 4.15.0.1146.133

External links

http://ubuntu.com/security/notices/USN-5541-1


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.



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