Ubuntu update for linux-raspi

1) Input validation error

EUVDB-ID: #VU70468

Risk: Medium

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

CVE-ID: CVE-2022-3643

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows an attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of network packets. An attacker with access to the guest OS can trigger the related physical NIC on the host to reset, abort, or crash by sending certain kinds of packets.

Mitigation

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

Vulnerable software versions

Ubuntu: 22.10

linux-image-5.19.0-1012-raspi (Ubuntu package): before 5.19.0-1012.19

linux-image-raspi (Ubuntu package): before 5.19.0.1012.11

linux-image-raspi-nolpae (Ubuntu package): before 5.19.0.1012.11

linux-image-5.19.0-1012-raspi-nolpae (Ubuntu package): before 5.19.0-1012.19

External links

http://ubuntu.com/security/notices/USN-5832-1

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.

2) Use-after-free

EUVDB-ID: #VU69795

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-2022-42896

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows an attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the l2cap_connect() and l2cap_le_connect_req() function in net/bluetooth/l2cap_core.c. An attacker with physical proximity to the affected device can trigger a use-after-free error and execute arbitrary code on the system.

Mitigation

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

Vulnerable software versions

Ubuntu: 22.10

linux-image-5.19.0-1012-raspi (Ubuntu package): before 5.19.0-1012.19

linux-image-raspi (Ubuntu package): before 5.19.0.1012.11

linux-image-raspi-nolpae (Ubuntu package): before 5.19.0.1012.11

linux-image-5.19.0-1012-raspi-nolpae (Ubuntu package): before 5.19.0-1012.19

External links

http://ubuntu.com/security/notices/USN-5832-1

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.

3) Stack-based buffer overflow

EUVDB-ID: #VU70442

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-2022-4378

CWE-ID: CWE-121 - Stack-based buffer overflow

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 __do_proc_dointvec() function. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 22.10

linux-image-5.19.0-1012-raspi (Ubuntu package): before 5.19.0-1012.19

linux-image-raspi (Ubuntu package): before 5.19.0.1012.11

linux-image-raspi-nolpae (Ubuntu package): before 5.19.0.1012.11

linux-image-5.19.0-1012-raspi-nolpae (Ubuntu package): before 5.19.0-1012.19

External links

http://ubuntu.com/security/notices/USN-5832-1

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.

4) Integer overflow

EUVDB-ID: #VU70464

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-2022-45934

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow within the l2cap_config_req() function in net/bluetooth/l2cap_core.c in Linux kernel. A local user can pass specially crafted L2CAP_CONF_REQ packets to the device, trigger an integer overflow and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 22.10

linux-image-5.19.0-1012-raspi (Ubuntu package): before 5.19.0-1012.19

linux-image-raspi (Ubuntu package): before 5.19.0.1012.11

linux-image-raspi-nolpae (Ubuntu package): before 5.19.0.1012.11

linux-image-5.19.0-1012-raspi-nolpae (Ubuntu package): before 5.19.0-1012.19

External links

http://ubuntu.com/security/notices/USN-5832-1

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.