Ubuntu update for linux-raspi



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2023-34324
CVE-2023-35827
CVE-2023-45863
CVE-2023-46343
CWE-ID CWE-833
CWE-416
CWE-787
CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

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

linux-image-raspi2 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1102-raspi (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-raspi-hwe-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Deadlock

EUVDB-ID: #VU81900

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-34324

CWE-ID: CWE-833 - Deadlock

Exploit availability: No

Description

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to improper event handling in Linux kernel. A malicious guest can disable paravirtualized device to cause a deadlock in a backend domain (other than dom0).

Mitigation

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

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1102.132

linux-image-raspi2 (Ubuntu package): before 5.4.0.1102.132

linux-image-5.4.0-1102-raspi (Ubuntu package): before Ubuntu Pro

linux-image-raspi-hwe-18.04 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

http://ubuntu.com/security/notices/USN-6625-3


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Use-after-free

EUVDB-ID: #VU82758

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-35827

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the ravb_remove in drivers/net/ethernet/renesas/ravb_main.c. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.

Mitigation

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

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1102.132

linux-image-raspi2 (Ubuntu package): before 5.4.0.1102.132

linux-image-5.4.0-1102-raspi (Ubuntu package): before Ubuntu Pro

linux-image-raspi-hwe-18.04 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

http://ubuntu.com/security/notices/USN-6625-3


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) Out-of-bounds write

EUVDB-ID: #VU84354

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-45863

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 within the fill_kobj_path() function in lib/kobject.c. A local user can can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1102.132

linux-image-raspi2 (Ubuntu package): before 5.4.0.1102.132

linux-image-5.4.0-1102-raspi (Ubuntu package): before Ubuntu Pro

linux-image-raspi-hwe-18.04 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

http://ubuntu.com/security/notices/USN-6625-3


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: #VU86243

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-46343

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 error within the send_acknowledge() function in net/nfc/nci/spi.c. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.

Mitigation

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

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1102.132

linux-image-raspi2 (Ubuntu package): before 5.4.0.1102.132

linux-image-5.4.0-1102-raspi (Ubuntu package): before Ubuntu Pro

linux-image-raspi-hwe-18.04 (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

http://ubuntu.com/security/notices/USN-6625-3


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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