Ubuntu update for linux-gke-5.3
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-3609 |
| CWE-ID | CWE-362 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
Ubuntu Operating systems & Components / Operating system linux-image-raspi2-hwe-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gkeop-5.3 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gke-5.3 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.3.0-75-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.3.0-75-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.3.0-1044-gke (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.3.0-1041-raspi2 (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Race condition
EUVDB-ID: #VU54292
Risk: Medium
CVSSv4.0: 7.1 [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:P/U:Green]
CVE-ID: CVE-2021-3609
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in the CAN BCM networking protocol (net/can/bcm.c) in the Linux kernel ranging from version 2.6.25 to mainline 5.13-rc6. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
MitigationUpdate the affected package linux-gke-5.3 to the latest version.
Vulnerable software versionsUbuntu: 18.04
linux-image-raspi2-hwe-18.04 (Ubuntu package): before 5.3.0.1041.30
linux-image-gkeop-5.3 (Ubuntu package): before 5.3.0.75.132
linux-image-gke-5.3 (Ubuntu package): before 5.3.0.1044.27
linux-image-5.3.0-75-lowlatency (Ubuntu package): before 5.3.0-75.71
linux-image-5.3.0-75-generic (Ubuntu package): before 5.3.0-75.71
linux-image-5.3.0-1044-gke (Ubuntu package): before 5.3.0-1044.47
linux-image-5.3.0-1041-raspi2 (Ubuntu package): before 5.3.0-1041.43
CPE2.3- cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
- cpe:2.3:a:canonical:linux-image-raspi2-hwe-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gkeop-5.3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gke-5.3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-5.3.0-75-lowlatency_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-5.3.0-75-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-5.3.0-1044-gke_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-5.3.0-1041-raspi2_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-5002-1
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.
