Ubuntu update for linux

1) Double Free

EUVDB-ID: #VU63575

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-2021-37159

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to hso_free_net_device() function in drivers/net/usb/hso.c in the Linux kernel calls unregister_netdev without checking for the NETREG_REGISTERED state. A local user can trigger double free and use-after-free errors and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-oracle (Ubuntu package): before 5.11.0.1021.22~20.04.14

linux-image-gcp (Ubuntu package): before 5.11.0.1022.24~20.04.21

linux-image-gke (Ubuntu package): before 5.11.0.1022.22

linux-image-azure (Ubuntu package): before 5.11.0.1021.22~20.04.21

linux-image-oem (Ubuntu package): before 5.4.0.90.94

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-raspi2 (Ubuntu package): before 4.15.0.1099.97

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1084.94

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1112.131

linux-image-4.15.0-1112-gcp (Ubuntu package): before 4.15.0-1112.126

linux-image-4.15.0-1099-raspi2 (Ubuntu package): before 4.15.0-1099.106

linux-image-4.15.0-1084-oracle (Ubuntu package): before 4.15.0-1084.92

linux-image-snapdragon (Ubuntu package): before 4.15.0.1116.119

linux-image-kvm (Ubuntu package): before 4.15.0.1103.99

linux-image-generic-lpae (Ubuntu package): before 4.15.0.163.152

linux-image-dell300x (Ubuntu package): before 4.15.0.1031.33

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1127.100

linux-image-4.15.0-163-generic-lpae (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-1116-snapdragon (Ubuntu package): before 4.15.0-1116.125

linux-image-4.15.0-1103-kvm (Ubuntu package): before 4.15.0-1103.105

linux-image-4.15.0-1031-dell300x (Ubuntu package): before 4.15.0-1031.36

linux-image-virtual (Ubuntu package): before 4.15.0.163.152

linux-image-lowlatency (Ubuntu package): before 4.15.0.163.152

linux-image-generic (Ubuntu package): before 4.15.0.163.152

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1116.119

linux-image-4.15.0-163-lowlatency (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-163-generic (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-1127-azure (Ubuntu package): before 4.15.0-1127.140

linux-image-4.15.0-1116-aws (Ubuntu package): before 4.15.0-1116.123

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1099.92

External links

http://ubuntu.com/security/notices/USN-5164-1

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) Memory leak

EUVDB-ID: #VU63813

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-2021-3744

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c. A local user can force the application to leak memory and perform denial of service attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-oracle (Ubuntu package): before 5.11.0.1021.22~20.04.14

linux-image-gcp (Ubuntu package): before 5.11.0.1022.24~20.04.21

linux-image-gke (Ubuntu package): before 5.11.0.1022.22

linux-image-azure (Ubuntu package): before 5.11.0.1021.22~20.04.21

linux-image-oem (Ubuntu package): before 5.4.0.90.94

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-raspi2 (Ubuntu package): before 4.15.0.1099.97

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1084.94

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1112.131

linux-image-4.15.0-1112-gcp (Ubuntu package): before 4.15.0-1112.126

linux-image-4.15.0-1099-raspi2 (Ubuntu package): before 4.15.0-1099.106

linux-image-4.15.0-1084-oracle (Ubuntu package): before 4.15.0-1084.92

linux-image-snapdragon (Ubuntu package): before 4.15.0.1116.119

linux-image-kvm (Ubuntu package): before 4.15.0.1103.99

linux-image-generic-lpae (Ubuntu package): before 4.15.0.163.152

linux-image-dell300x (Ubuntu package): before 4.15.0.1031.33

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1127.100

linux-image-4.15.0-163-generic-lpae (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-1116-snapdragon (Ubuntu package): before 4.15.0-1116.125

linux-image-4.15.0-1103-kvm (Ubuntu package): before 4.15.0-1103.105

linux-image-4.15.0-1031-dell300x (Ubuntu package): before 4.15.0-1031.36

linux-image-virtual (Ubuntu package): before 4.15.0.163.152

linux-image-lowlatency (Ubuntu package): before 4.15.0.163.152

linux-image-generic (Ubuntu package): before 4.15.0.163.152

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1116.119

linux-image-4.15.0-163-lowlatency (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-163-generic (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-1127-azure (Ubuntu package): before 4.15.0-1127.140

linux-image-4.15.0-1116-aws (Ubuntu package): before 4.15.0-1116.123

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1099.92

External links

http://ubuntu.com/security/notices/USN-5164-1

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.

3) Memory leak

EUVDB-ID: #VU63817

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3764

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak error in the ccp_run_aes_gcm_cmd() function in Linux kernel. A local user can trigger a memory leak error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-oracle (Ubuntu package): before 5.11.0.1021.22~20.04.14

linux-image-gcp (Ubuntu package): before 5.11.0.1022.24~20.04.21

linux-image-gke (Ubuntu package): before 5.11.0.1022.22

linux-image-azure (Ubuntu package): before 5.11.0.1021.22~20.04.21

linux-image-oem (Ubuntu package): before 5.4.0.90.94

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.187.173

linux-image-raspi2 (Ubuntu package): before 4.15.0.1099.97

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1084.94

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1112.131

linux-image-4.15.0-1112-gcp (Ubuntu package): before 4.15.0-1112.126

linux-image-4.15.0-1099-raspi2 (Ubuntu package): before 4.15.0-1099.106

linux-image-4.15.0-1084-oracle (Ubuntu package): before 4.15.0-1084.92

linux-image-snapdragon (Ubuntu package): before 4.15.0.1116.119

linux-image-kvm (Ubuntu package): before 4.15.0.1103.99

linux-image-generic-lpae (Ubuntu package): before 4.15.0.163.152

linux-image-dell300x (Ubuntu package): before 4.15.0.1031.33

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1127.100

linux-image-4.15.0-163-generic-lpae (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-1116-snapdragon (Ubuntu package): before 4.15.0-1116.125

linux-image-4.15.0-1103-kvm (Ubuntu package): before 4.15.0-1103.105

linux-image-4.15.0-1031-dell300x (Ubuntu package): before 4.15.0-1031.36

linux-image-virtual (Ubuntu package): before 4.15.0.163.152

linux-image-lowlatency (Ubuntu package): before 4.15.0.163.152

linux-image-generic (Ubuntu package): before 4.15.0.163.152

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1116.119

linux-image-4.15.0-163-lowlatency (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-163-generic (Ubuntu package): before 4.15.0-163.171

linux-image-4.15.0-1127-azure (Ubuntu package): before 4.15.0-1127.140

linux-image-4.15.0-1116-aws (Ubuntu package): before 4.15.0-1116.123

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1099.92

External links

http://ubuntu.com/security/notices/USN-5164-1

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.