CVE-2018-18281MEDIUM
Description
Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.
References
http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html
http://www.openwall.com/lists/oss-security/2018/10/29/5
http://www.securityfocus.com/bid/105761
http://www.securityfocus.com/bid/106503
https://access.redhat.com/errata/RHSA-2019:0831
https://access.redhat.com/errata/RHSA-2019:2029
https://access.redhat.com/errata/RHSA-2019:2043
https://access.redhat.com/errata/RHSA-2020:0036
https://access.redhat.com/errata/RHSA-2020:0100
https://access.redhat.com/errata/RHSA-2020:0103
https://access.redhat.com/errata/RHSA-2020:0179
https://bugs.chromium.org/p/project-zero/issues/detail?id=1695
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
https://usn.ubuntu.com/3832-1/
https://usn.ubuntu.com/3835-1/
https://usn.ubuntu.com/3871-1/
https://usn.ubuntu.com/3871-3/
https://usn.ubuntu.com/3871-4/
https://usn.ubuntu.com/3871-5/
Details
Source: MITRE
Published: 2018-10-30
Updated: 2020-08-24
Type: CWE-459
Risk Information
CVSS v2.0
Base Score: 4.6
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.9
Severity: MEDIUM
CVSS v3.0
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH
Vulnerable Software
Configuration 1
OR
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Configuration 2
OR
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Configuration 3
OR
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 137217 | OracleVM 3.4 : Unbreakable / etc (OVMSA-2020-0020) (Stack Clash) | Nessus | OracleVM Local Security Checks | critical |
| 137173 | Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2020-5708) (Stack Clash) | Nessus | Oracle Linux Local Security Checks | critical |
| 137172 | Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2020-5706) | Nessus | Oracle Linux Local Security Checks | medium |
| 133164 | RHEL 7 : kernel (RHSA-2020:0179) | Nessus | Red Hat Local Security Checks | medium |
| 132947 | RHEL 6 : kernel-rt (RHSA-2020:0100) | Nessus | Red Hat Local Security Checks | medium |
| 132886 | RHEL 7 : kernel (RHSA-2020:0103) | Nessus | Red Hat Local Security Checks | medium |
| 132700 | RHEL 7 : kernel (RHSA-2020:0036) | Nessus | Red Hat Local Security Checks | critical |
| 132495 | NewStart CGSL CORE 5.05 / MAIN 5.05 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0253) | Nessus | NewStart CGSL Local Security Checks | high |
| 132474 | NewStart CGSL CORE 5.05 / MAIN 5.05 : kernel Multiple Vulnerabilities (NS-SA-2019-0247) | Nessus | NewStart CGSL Local Security Checks | high |
| 129920 | NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0183) | Nessus | NewStart CGSL Local Security Checks | high |
| 129900 | NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel Multiple Vulnerabilities (NS-SA-2019-0180) | Nessus | NewStart CGSL Local Security Checks | high |
| 128651 | CentOS 7 : kernel (CESA-2019:2029) | Nessus | CentOS Local Security Checks | high |
| 128226 | Scientific Linux Security Update : kernel on SL7.x x86_64 (20190806) | Nessus | Scientific Linux Local Security Checks | high |
| 127655 | RHEL 7 : kernel-rt (RHSA-2019:2043) | Nessus | Red Hat Local Security Checks | high |
| 127650 | RHEL 7 : kernel (RHSA-2019:2029) | Nessus | Red Hat Local Security Checks | high |
| 125283 | SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1289-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) | Nessus | SuSE Local Security Checks | high |
| 124975 | EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1522) | Nessus | Huawei Local Security Checks | high |
| 124834 | EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1512) | Nessus | Huawei Local Security Checks | high |
| 124257 | RHEL 7 : kernel-alt (RHSA-2019:0831) | Nessus | Red Hat Local Security Checks | medium |
| 123721 | EulerOS Virtualization 2.5.4 : kernel (EulerOS-SA-2019-1253) | Nessus | Huawei Local Security Checks | medium |
| 123712 | EulerOS Virtualization 2.5.3 : kernel (EulerOS-SA-2019-1244) | Nessus | Huawei Local Security Checks | medium |
| 123605 | EulerOS 2.0 SP2 : kernel (EulerOS-SA-2019-1131) | Nessus | Huawei Local Security Checks | high |
| 123420 | Debian DLA-1731-2 : linux regression update (Spectre) | Nessus | Debian Local Security Checks | high |
| 123397 | openSUSE Security Update : the Linux Kernel (openSUSE-2019-974) | Nessus | SuSE Local Security Checks | medium |
| 123121 | EulerOS 2.0 SP3 : kernel (EulerOS-SA-2019-1108) | Nessus | Huawei Local Security Checks | high |
| 122879 | Debian DLA-1715-1 : linux-4.9 security update (Spectre) | Nessus | Debian Local Security Checks | high |
| 122699 | EulerOS 2.0 SP5 : kernel (EulerOS-SA-2019-1076) | Nessus | Huawei Local Security Checks | medium |
| 122343 | SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0439-1) | Nessus | SuSE Local Security Checks | high |
| 122052 | Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : linux-azure vulnerabilities (USN-3871-5) | Nessus | Ubuntu Local Security Checks | high |
| 121598 | Ubuntu 14.04 LTS : linux vulnerabilities (USN-3880-1) | Nessus | Ubuntu Local Security Checks | high |
| 121594 | Ubuntu 16.04 LTS : linux-hwe, linux-aws-hwe, linux-gcp vulnerabilities (USN-3871-4) | Nessus | Ubuntu Local Security Checks | high |
| 121593 | Ubuntu 18.04 LTS : linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities (USN-3871-3) | Nessus | Ubuntu Local Security Checks | high |
| 121592 | Ubuntu 18.04 LTS : Linux kernel regression (USN-3871-2) | Nessus | Ubuntu Local Security Checks | high |
| 121571 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:0224-1) | Nessus | SuSE Local Security Checks | high |
| 121569 | SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0222-1) (Spectre) | Nessus | SuSE Local Security Checks | high |
| 121505 | Slackware 14.2 : Slackware 14.2 kernel (SSA:2019-030-01) | Nessus | Slackware Local Security Checks | high |
| 121469 | Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-3871-1) | Nessus | Ubuntu Local Security Checks | high |
| 121468 | SUSE SLES11 Security Update : kernel (SUSE-SU-2019:13937-1) | Nessus | SuSE Local Security Checks | high |
| 121208 | SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0095-1) | Nessus | SuSE Local Security Checks | high |
| 119708 | openSUSE Security Update : the Linux Kernel (openSUSE-2018-1548) | Nessus | SuSE Local Security Checks | medium |
| 119647 | SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:4069-1) | Nessus | SuSE Local Security Checks | high |
| 119338 | Ubuntu 18.10 : linux, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities (USN-3835-1) | Nessus | Ubuntu Local Security Checks | high |
| 119302 | Ubuntu 18.10 : Linux kernel (AWS) vulnerabilities (USN-3832-1) | Nessus | Ubuntu Local Security Checks | high |
| 119077 | openSUSE Security Update : the Linux Kernel (openSUSE-2018-1427) | Nessus | SuSE Local Security Checks | high |
| 118952 | SUSE SLES11 Security Update : kernel (SUSE-SU-2018:3746-1) | Nessus | SuSE Local Security Checks | high |
| 118882 | SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:3689-1) | Nessus | SuSE Local Security Checks | high |