Ubuntu update for linux

Published: 2021-03-16

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-36158 CVE-2021-20194
CWE-ID	CWE-120 CWE-122
Exploitation vector	Local
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-virtual-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lpae-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-64k-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-virtual (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-raspi-nolpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oracle (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gke (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-64k (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gcp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-45-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-45-generic-lpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-45-generic-64k (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-45-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-1025-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-1024-gcp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-1024-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-1022-oracle (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-1020-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-1017-raspi-nolpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.8.0-1017-raspi (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU92419

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36158

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a local privileged user to execute arbitrary code.

The vulnerability exists due to buffer overflow error within the mwifiex_cmd_802_11_ad_hoc_start() function in drivers/net/wireless/marvell/mwifiex/join.c. A local privileged user can execute arbitrary code.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 20.10

linux-image-raspi (Ubuntu package): before 5.8.0.1017.20

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.8.0.45.51~20.04.31

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.8.0.45.51~20.04.31

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.8.0.45.51~20.04.31

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.8.0.45.51~20.04.31

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.8.0.45.51~20.04.31

linux-image-virtual (Ubuntu package): before 5.8.0.45.50

linux-image-raspi-nolpae (Ubuntu package): before 5.8.0.1017.20

linux-image-oracle (Ubuntu package): before 5.8.0.1022.21

linux-image-oem-20.04 (Ubuntu package): before 5.8.0.45.50

linux-image-lowlatency (Ubuntu package): before 5.8.0.45.50

linux-image-kvm (Ubuntu package): before 5.8.0.1020.22

linux-image-gke (Ubuntu package): before 5.8.0.1024.24

linux-image-generic-lpae (Ubuntu package): before 5.8.0.45.50

linux-image-generic-64k (Ubuntu package): before 5.8.0.45.50

linux-image-generic (Ubuntu package): before 5.8.0.45.50

linux-image-gcp (Ubuntu package): before 5.8.0.1024.24

linux-image-azure (Ubuntu package): before 5.8.0.1024.24

linux-image-aws (Ubuntu package): before 5.8.0.1025.27

linux-image-5.8.0-45-lowlatency (Ubuntu package): before 5.8.0-45.51~20.04.1

linux-image-5.8.0-45-generic-lpae (Ubuntu package): before 5.8.0-45.51~20.04.1

linux-image-5.8.0-45-generic-64k (Ubuntu package): before 5.8.0-45.51~20.04.1

linux-image-5.8.0-45-generic (Ubuntu package): before 5.8.0-45.51~20.04.1

linux-image-5.8.0-1025-aws (Ubuntu package): before 5.8.0-1025.27

linux-image-5.8.0-1024-gcp (Ubuntu package): before 5.8.0-1024.25

linux-image-5.8.0-1024-azure (Ubuntu package): before 5.8.0-1024.26

linux-image-5.8.0-1022-oracle (Ubuntu package): before 5.8.0-1022.23

linux-image-5.8.0-1020-kvm (Ubuntu package): before 5.8.0-1020.22

linux-image-5.8.0-1017-raspi-nolpae (Ubuntu package): before 5.8.0-1017.20

linux-image-5.8.0-1017-raspi (Ubuntu package): before 5.8.0-1017.20

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4879-1

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.

2) Heap-based buffer overflow

EUVDB-ID: #VU60356

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-2021-20194

CWE-ID: CWE-122 - Heap-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 __cgroup_bpf_run_filter_getsockopt() function, when kernel is compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered. A local user can trigger a heap-based buffer overflow and execute arbitrary code with elevated privileges.