Ubuntu update for linux

Published: 2022-02-22 | Updated: 2022-11-10

Risk	Medium
Patch available	YES
Number of vulnerabilities	13
CVE-ID	CVE-2020-26147 CVE-2020-26558 CVE-2021-0129 CVE-2021-28972 CVE-2021-33034 CVE-2021-34693 CVE-2021-3483 CVE-2021-3564 CVE-2021-3612 CVE-2021-3679 CVE-2021-38204 CVE-2021-42008 CVE-2021-45485
CWE-ID	CWE-20 CWE-254 CWE-284 CWE-119 CWE-416 CWE-908 CWE-415 CWE-787 CWE-400 CWE-200
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #12 is available.
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system linux-image-virtual-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1099-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-219-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1135-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1100-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-219-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws (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 13 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU53172

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26147

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. A remote attacker on the local network can inject packets and/or exfiltrate selected fragments

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

2) Security features bypass

EUVDB-ID: #VU53579

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26558

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an impersonation in the Passkey Entry protocol flaw. A remote attacker on the local network can perform a man-in-the-middle (MITM) attack and impersonate the initiating device without any previous knowledge.

Note: This vulnerability affects the following specifications:

BR/EDR Secure Simple Pairing in Bluetooth Core Specifications 2.1 through 5.2
BR/EDR Secure Connections Pairing in Bluetooth Core Specifications 4.1 through 5.2
LE Secure Connections Pairing in Bluetooth Core Specifications 4.2 through 5.2

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

3) Improper access control

EUVDB-ID: #VU54202

Risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-0129

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote authenticated attacker on the local network can bypass implemented security restrictions and enable information disclosure

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

4) Buffer overflow

EUVDB-ID: #VU56819

Risk: Low

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

CVE-ID: CVE-2021-28972

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the drivers/pci/hotplug/rpadlpar_sysfs.c. A local administrator can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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: #VU54454

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-2021-33034

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 net/bluetooth/hci_event.c when destroying an hci_chan. A local user can escalate privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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) Use of uninitialized resource

EUVDB-ID: #VU55263

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-2021-34693

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: No

Description

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

The vulnerability exists due to net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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) Use-after-free

EUVDB-ID: #VU63659

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-2021-3483

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 Nosy driver in the Linux kernel. A local user can trigger use-after-free and to escalate privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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) Double Free

EUVDB-ID: #VU63660

Risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3564

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to bluetooth subsystem in the Linux kernel does not properly handle HCI device detach events. An attacker with physical access to the system can trigger double free error and perform a denial of service attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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.

9) Out-of-bounds write

EUVDB-ID: #VU55231

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-2021-3612

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 joystick devices subsystem in Linux kernel. A local user can make a specially crafted JSIOCSBTNMAP IOCTL call, trigger out-of-bounds write and execute arbitrary code with escalated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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) Resource exhaustion

EUVDB-ID: #VU63664

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3679

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to lack of CPU resource in the Linux kernel tracing module functionality when using trace ring buffer in a specific way. A privileged local user (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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) Use-after-free

EUVDB-ID: #VU63666

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38204

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the drivers/usb/host/max3421-hcd.c in the Linux kernel. An attacker with physical access to the system can remove a MAX-3421 USB device to perform a denial of service attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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.

12) Out-of-bounds write

EUVDB-ID: #VU63669

Risk: Low

CVSSv3.1: 6 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-42008

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 in the decode_data() function in drivers/net/hamradio/6pack.c in the Linux kernel. A local user can send input from a process that has the CAP_NET_ADMIN capability and escalate privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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.

13) Information disclosure

EUVDB-ID: #VU63668

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-45485

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to an error in the IPv6 implementation in the Linux kernel. A remote attacker can gain access to sensitive information.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1099-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.219.226

linux-image-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-generic (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1135-aws (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-1100-kvm (Ubuntu package): before 4.4.0.219.226

linux-image-4.4.0-219-lowlatency (Ubuntu package): before 4.4.0.219.226

linux-image-aws (Ubuntu package): before 4.4.0.219.226

linux-image-generic (Ubuntu package): before 4.4.0.219.226

linux-image-virtual (Ubuntu package): before 4.4.0.219.226

External links

http://ubuntu.com/security/notices/USN-5299-1

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.