Executive Summary
Summary | |
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Title | Linux kernel (AWS) vulnerabilities |
Informations | |||
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Name | USN-3832-1 | First vendor Publication | 2018-11-30 |
Vendor | Ubuntu | Last vendor Modification | 2018-11-30 |
Severity (Vendor) | N/A | Revision | N/A |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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Overall CVSS Score | NA | ||
Base Score | NA | Environmental Score | NA |
impact SubScore | NA | Temporal Score | NA |
Exploitabality Sub Score | NA | ||
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C) | |||
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Cvss Base Score | 7.2 | Attack Range | Local |
Cvss Impact Score | 10 | Attack Complexity | Low |
Cvss Expoit Score | 3.9 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.10 Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-aws: Linux kernel for Amazon Web Services (AWS) systems Details: Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) It was discovered that the BPF verifier in the Linux kernel did not correctly compute numeric bounds in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-18445) Daniel Dadap discovered that the module loading implementation in the Linux kernel did not properly enforce signed module loading when booted with UEFI Secure Boot in some situations. A local privileged attacker could use this to execute untrusted code in the kernel. (CVE-2018-18653) Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace. (CVE-2018-18955) Philipp Wendler discovered that the overlayfs implementation in the Linux kernel did not properly verify the directory contents permissions from within a unprivileged user namespace. A local attacker could use this to expose sensitive information (protected file names). (CVE-2018-6559) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.10: After a standard system update you need to reboot your computer to make all the necessary changes. XXX MAYBE WITH XXX ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: Package Information: |
Original Source
Url : http://www.ubuntu.com/usn/USN-3832-1 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
20 % | CWE-459 | Incomplete Cleanup |
20 % | CWE-362 | Race Condition |
20 % | CWE-347 | Improper Verification of Cryptographic Signature |
20 % | CWE-200 | Information Exposure |
20 % | CWE-125 | Out-of-bounds Read |
CPE : Common Platform Enumeration
Nessus® Vulnerability Scanner
Date | Description |
---|---|
2019-01-03 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-9f4381d8c4.nasl - Type : ACT_GATHER_INFO |
2019-01-03 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-ec3bf1b228.nasl - Type : ACT_GATHER_INFO |
2018-11-09 | Name : The remote Amazon Linux 2 host is missing a security update. File : al2_ALAS-2018-1100.nasl - Type : ACT_GATHER_INFO |
2018-11-08 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2018-1100.nasl - Type : ACT_GATHER_INFO |
2018-10-17 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-2ee3411cb8.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
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2018-12-06 17:21:07 |
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2018-11-30 09:19:01 |
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