Ubuntu update for linux-raspi2



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-34693
CVE-2021-3612
CWE-ID CWE-908
CWE-787
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

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

linux-image-4.15.0-1095-raspi2 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use of uninitialized resource

EUVDB-ID: #VU55263

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

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-raspi2 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-raspi2 (Ubuntu package): before 4.15.0.1095.93

linux-image-4.15.0-1095-raspi2 (Ubuntu package): before 4.15.0-1095.101

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5073-3


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.

2) Out-of-bounds write

EUVDB-ID: #VU55231

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-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-raspi2 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-raspi2 (Ubuntu package): before 4.15.0.1095.93

linux-image-4.15.0-1095-raspi2 (Ubuntu package): before 4.15.0-1095.101

CPE2.3 External links

https://ubuntu.com/security/notices/USN-5073-3


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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