Ubuntu update for linux-aws
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-25704 CVE-2020-28374 |
| CWE-ID | CWE-401 CWE-22 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Ubuntu Operating systems & Components / Operating system linux-image-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.15.0-1106-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gke-4.15 (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-4.15.0-1078-gke (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws-hwe (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.15.0-1093-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gcp-lts-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.15.0-1092-gcp (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-lts-18.04 (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-4.15.0-1064-oracle (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-oracle-lts-18.04 (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-aws-lts-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.15.0-1095-snapdragon (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.15.0-1084-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.15.0-1078-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) Memory leak
EUVDB-ID: #VU55258
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-2020-25704
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the Linux kernel performance monitoring subsystem when using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service.
Update the affected package linux-aws to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 18.04
linux-image-azure (Ubuntu package): before 4.15.0.1106.79
linux-image-4.15.0-1106-azure (Ubuntu package): before 4.15.0-1106.118~14.04.1
linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1078.82
linux-image-gke (Ubuntu package): before 4.15.0.1078.82
linux-image-4.15.0-1078-gke (Ubuntu package): before 4.15.0-1078.83
linux-image-aws-hwe (Ubuntu package): before 4.15.0.1093.86
linux-image-4.15.0-1093-aws (Ubuntu package): before 4.15.0-1093.99~16.04.1
linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1092.110
linux-image-4.15.0-1092-gcp (Ubuntu package): before 4.15.0-1092.105~16.04.1
linux-image-gcp (Ubuntu package): before 4.15.0.1092.93
linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1106.79
linux-image-oracle (Ubuntu package): before 4.15.0.1064.52
linux-image-4.15.0-1064-oracle (Ubuntu package): before 4.15.0-1064.71~16.04.1
linux-image-snapdragon (Ubuntu package): before 4.15.0.1095.98
linux-image-raspi2 (Ubuntu package): before 4.15.0.1078.75
linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1064.74
linux-image-kvm (Ubuntu package): before 4.15.0.1084.80
linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1093.96
linux-image-4.15.0-1095-snapdragon (Ubuntu package): before 4.15.0-1095.104
linux-image-4.15.0-1084-kvm (Ubuntu package): before 4.15.0-1084.86
linux-image-4.15.0-1078-raspi2 (Ubuntu package): before 4.15.0-1078.83
CPE2.3- cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
- cpe:2.3:a:canonical:linux-image-azure_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1106-azure_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gke-4.15_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gke_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1078-gke_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-aws-hwe_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1093-aws_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gcp-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1092-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-azure-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1064-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-snapdragon_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-raspi2_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-oracle-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-aws-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1095-snapdragon_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1084-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1078-raspi2_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-4711-1
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) Path traversal
EUVDB-ID: #VU49914
Risk: Medium
CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-28374
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in drivers/target/target_core_xcopy.c in the Linux kernel. A remote user with access to iSCSI LUN can send a specially crafted XCOPY request and read or write arbitrary files on the system.
Update the affected package linux-aws to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 18.04
linux-image-azure (Ubuntu package): before 4.15.0.1106.79
linux-image-4.15.0-1106-azure (Ubuntu package): before 4.15.0-1106.118~14.04.1
linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1078.82
linux-image-gke (Ubuntu package): before 4.15.0.1078.82
linux-image-4.15.0-1078-gke (Ubuntu package): before 4.15.0-1078.83
linux-image-aws-hwe (Ubuntu package): before 4.15.0.1093.86
linux-image-4.15.0-1093-aws (Ubuntu package): before 4.15.0-1093.99~16.04.1
linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1092.110
linux-image-4.15.0-1092-gcp (Ubuntu package): before 4.15.0-1092.105~16.04.1
linux-image-gcp (Ubuntu package): before 4.15.0.1092.93
linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1106.79
linux-image-oracle (Ubuntu package): before 4.15.0.1064.52
linux-image-4.15.0-1064-oracle (Ubuntu package): before 4.15.0-1064.71~16.04.1
linux-image-snapdragon (Ubuntu package): before 4.15.0.1095.98
linux-image-raspi2 (Ubuntu package): before 4.15.0.1078.75
linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1064.74
linux-image-kvm (Ubuntu package): before 4.15.0.1084.80
linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1093.96
linux-image-4.15.0-1095-snapdragon (Ubuntu package): before 4.15.0-1095.104
linux-image-4.15.0-1084-kvm (Ubuntu package): before 4.15.0-1084.86
linux-image-4.15.0-1078-raspi2 (Ubuntu package): before 4.15.0-1078.83
CPE2.3- cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
- cpe:2.3:a:canonical:linux-image-azure_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1106-azure_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gke-4.15_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gke_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1078-gke_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-aws-hwe_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1093-aws_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gcp-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1092-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-azure-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1064-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-snapdragon_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-raspi2_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-oracle-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-aws-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1095-snapdragon_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1084-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:linux-image-4.15.0-1078-raspi2_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-4711-1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
