Ubuntu update for linux-raspi

1) Out-of-bounds write

EUVDB-ID: #VU62027

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-2022-1015

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 within the nft_validate_register_store and nft_validate_register_load in linux/net/netfilter/nf_tables_api.c of the netfilter subsystem. A local user can escalate privileges on the system.

Mitigation

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

Vulnerable software versions

Ubuntu: 22.04

linux-image-raspi-nolpae (Ubuntu package): before 5.15.0.1006.6

linux-image-raspi (Ubuntu package): before 5.15.0.1006.6

linux-image-5.15.0-1006-raspi-nolpae (Ubuntu package): before 5.15.0-1006.6

linux-image-5.15.0-1006-raspi (Ubuntu package): before 5.15.0-1006.6

External links

http://ubuntu.com/security/notices/USN-5390-2

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.

2) Use-after-free

EUVDB-ID: #VU62028

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-2022-1016

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in net/netfilter/nf_tables_core.c:nft_do_chain in Linux kernel.. A local user can trigger a use-after-free error and gain access to sensitive information.

Mitigation

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

Vulnerable software versions

Ubuntu: 22.04

linux-image-raspi-nolpae (Ubuntu package): before 5.15.0.1006.6

linux-image-raspi (Ubuntu package): before 5.15.0.1006.6

linux-image-5.15.0-1006-raspi-nolpae (Ubuntu package): before 5.15.0-1006.6

linux-image-5.15.0-1006-raspi (Ubuntu package): before 5.15.0-1006.6

External links

http://ubuntu.com/security/notices/USN-5390-2

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) Buffer overflow

EUVDB-ID: #VU62601

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-2022-26490

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 boundary error within the st21nfca_connectivity_event_received() function in drivers/nfc/st21nfca/se.c in Linux kernel. A local user can run a specially crafted program to trigger buffer overflow and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 22.04

linux-image-raspi-nolpae (Ubuntu package): before 5.15.0.1006.6

linux-image-raspi (Ubuntu package): before 5.15.0.1006.6

linux-image-5.15.0-1006-raspi-nolpae (Ubuntu package): before 5.15.0-1006.6

linux-image-5.15.0-1006-raspi (Ubuntu package): before 5.15.0-1006.6

External links

http://ubuntu.com/security/notices/USN-5390-2

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.