Ubuntu update for linux

Published: 2020-10-14 | Updated: 2025-04-23

Risk	Low
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2020-16119 CVE-2018-10322 CVE-2020-14314 CVE-2020-25285
CWE-ID	CWE-416 CWE-476 CWE-125
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-virtual-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lpae-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1081-aws (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-4.4.0-193-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-193-generic-lpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-193-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-snapdragon (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-powerpc64-smp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-powerpc64-emb (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-powerpc-smp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-powerpc-e500mc (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-4.4.0-193-powerpc64-smp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-193-powerpc64-emb (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-193-powerpc-smp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-193-powerpc-e500mc (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1145-snapdragon (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1141-raspi2 (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-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-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1117-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1082-kvm (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU68424

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-2020-16119

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error caused by the reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.193.169

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.193.169

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.193.169

linux-image-generic-lpae-lts-xenial (Ubuntu package): before 4.4.0.193.169

linux-image-4.4.0-1081-aws (Ubuntu package): before 4.4.0-1081.85

linux-image-aws (Ubuntu package): before 4.4.0.1081.78

linux-image-4.4.0-193-lowlatency (Ubuntu package): before 4.4.0-193.224~14.04.1

linux-image-4.4.0-193-generic-lpae (Ubuntu package): before 4.4.0-193.224~14.04.1

linux-image-4.4.0-193-generic (Ubuntu package): before 4.4.0-193.224~14.04.1

linux-image-snapdragon (Ubuntu package): before 4.4.0.1145.137

linux-image-raspi2 (Ubuntu package): before 4.4.0.1141.141

linux-image-powerpc64-smp (Ubuntu package): before 4.4.0.193.199

linux-image-powerpc64-emb (Ubuntu package): before 4.4.0.193.199

linux-image-powerpc-smp (Ubuntu package): before 4.4.0.193.199

linux-image-powerpc-e500mc (Ubuntu package): before 4.4.0.193.199

linux-image-generic-lpae (Ubuntu package): before 4.4.0.193.199

linux-image-4.4.0-193-powerpc64-smp (Ubuntu package): before 4.4.0-193.224

linux-image-4.4.0-193-powerpc64-emb (Ubuntu package): before 4.4.0-193.224

linux-image-4.4.0-193-powerpc-smp (Ubuntu package): before 4.4.0-193.224

linux-image-4.4.0-193-powerpc-e500mc (Ubuntu package): before 4.4.0-193.224

linux-image-4.4.0-1145-snapdragon (Ubuntu package): before 4.4.0-1145.155

linux-image-4.4.0-1141-raspi2 (Ubuntu package): before 4.4.0-1141.151

linux-image-virtual (Ubuntu package): before 4.4.0.193.199

linux-image-lowlatency (Ubuntu package): before 4.4.0.193.199

linux-image-kvm (Ubuntu package): before 4.4.0.1082.80

linux-image-generic (Ubuntu package): before 4.4.0.193.199

linux-image-4.4.0-1117-aws (Ubuntu package): before 4.4.0-1117.131

linux-image-4.4.0-1082-kvm (Ubuntu package): before 4.4.0-1082.91

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4579-1

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) NULL pointer dereference

EUVDB-ID: #VU12186

Risk: Low

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

CVE-ID: CVE-2018-10322

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the xfs_dinode_verify function in the xfs/xfs/libxfs/xfs_inode_buf.c source code file due to NULL pointer dereference when handling Extended File System (XFS) images. A local attacker can mount a specially crafted XFS filesystem image when filesystem operations are executed on the mounted image and cause the service to crash.