CVE-2020-14311medium
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Description
There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.
References
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
https://usn.ubuntu.com/4432-1/
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
https://security.gentoo.org/glsa/202104-05
http://www.openwall.com/lists/oss-security/2021/09/17/2
Details
Source: MITRE
Published: 2020-07-31
Updated: 2021-10-19
Type: CWE-190
Risk Information
CVSS v2
Base Score: 3.6
Vector: AV:L/AC:L/Au:N/C:N/I:P/A:P
Impact Score: 4.9
Exploitability Score: 3.9
Severity: LOW
CVSS v3
Base Score: 6
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Impact Score: 5.2
Exploitability Score: 0.8
Severity: MEDIUM
Vulnerable Software
Configuration 1
OR
Configuration 2
OR
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*
Configuration 3
OR
Configuration 4
OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 150632 | SUSE SLES11 Security Update : grub2 (SUSE-SU-2020:14440-1) | Nessus | SuSE Local Security Checks | medium |
| 149217 | GLSA-202104-05 : GRUB: Multiple vulnerabilities | Nessus | Gentoo Local Security Checks | high |
| 147445 | EulerOS Virtualization 2.9.1 : grub2 (EulerOS-SA-2021-1601) | Nessus | Huawei Local Security Checks | medium |
| 147274 | NewStart CGSL CORE 5.04 / MAIN 5.04 : grub2 Multiple Vulnerabilities (NS-SA-2021-0008) | Nessus | NewStart CGSL Local Security Checks | medium |
| 146030 | CentOS 8 : grub2 (CESA-2020:3216) | Nessus | CentOS Local Security Checks | medium |
| 140948 | EulerOS Virtualization for ARM 64 3.0.6.0 : grub2 (EulerOS-SA-2020-2000) | Nessus | Huawei Local Security Checks | medium |
| 139956 | EulerOS 2.0 SP8 : grub2 (EulerOS-SA-2020-1853) | Nessus | Huawei Local Security Checks | medium |
| 139449 | openSUSE Security Update : grub2 (openSUSE-2020-1169) | Nessus | SuSE Local Security Checks | medium |
| 139448 | openSUSE Security Update : grub2 (openSUSE-2020-1168) | Nessus | SuSE Local Security Checks | medium |
| 139365 | Ubuntu 16.04 LTS / 18.04 LTS / 20.04 : GRUB2 regression (USN-4432-2) | Nessus | Ubuntu Local Security Checks | medium |
| 139294 | RHEL 7 : grub2 (RHSA-2020:3274) | Nessus | Red Hat Local Security Checks | medium |
| 139288 | RHEL 7 : grub2 (RHSA-2020:3271) | Nessus | Red Hat Local Security Checks | medium |
| 139287 | RHEL 7 : grub2 (RHSA-2020:3276) | Nessus | Red Hat Local Security Checks | medium |
| 139284 | RHEL 7 : grub2 (RHSA-2020:3273) | Nessus | Red Hat Local Security Checks | medium |
| 139283 | RHEL 7 : grub2 (RHSA-2020:3275) | Nessus | Red Hat Local Security Checks | medium |
| 139243 | Photon OS 2.0: Grub2 PHSA-2020-2.0-0267 | Nessus | PhotonOS Local Security Checks | medium |
| 139242 | Photon OS 1.0: Grub2 PHSA-2020-1.0-0311 | Nessus | PhotonOS Local Security Checks | medium |
| 139239 | Windows Security Feature Bypass in Secure Boot (BootHole) | Nessus | Windows | medium |
| 139236 | CentOS 7 : grub2 (CESA-2020:3217) | Nessus | CentOS Local Security Checks | medium |
| 139198 | RHEL 7 : grub2 (RHSA-2020:3217) | Nessus | Red Hat Local Security Checks | medium |
| 139194 | RHEL 8 : grub2 (RHSA-2020:3216) | Nessus | Red Hat Local Security Checks | medium |
| 139193 | RHEL 8 : grub2 (RHSA-2020:3223) | Nessus | Red Hat Local Security Checks | medium |
| 139192 | RHEL 8 : grub2 (RHSA-2020:3227) | Nessus | Red Hat Local Security Checks | medium |
| 139179 | Ubuntu 16.04 LTS / 18.04 LTS / 20.04 : GRUB 2 vulnerabilities (USN-4432-1) | Nessus | Ubuntu Local Security Checks | medium |
| 139178 | SUSE SLES12 Security Update : grub2 (SUSE-SU-2020:2079-1) | Nessus | SuSE Local Security Checks | medium |
| 139177 | SUSE SLES12 Security Update : grub2 (SUSE-SU-2020:2078-1) | Nessus | SuSE Local Security Checks | medium |
| 139176 | SUSE SLED15 / SLES15 Security Update : grub2 (SUSE-SU-2020:2077-1) | Nessus | SuSE Local Security Checks | medium |
| 139175 | SUSE SLES12 Security Update : grub2 (SUSE-SU-2020:2076-1) | Nessus | SuSE Local Security Checks | medium |
| 139174 | SUSE SLED15 / SLES15 Security Update : grub2 (SUSE-SU-2020:2074-1) | Nessus | SuSE Local Security Checks | medium |
| 139173 | SUSE SLES15 Security Update : grub2 (SUSE-SU-2020:2073-1) | Nessus | SuSE Local Security Checks | medium |
| 139165 | Oracle Linux 8 : grub2 (ELSA-2020-5786) | Nessus | Oracle Linux Local Security Checks | critical |
| 139164 | Oracle Linux 7 : grub2 (ELSA-2020-5782) | Nessus | Oracle Linux Local Security Checks | critical |
| 139099 | Debian DSA-4735-1 : grub2 - security update | Nessus | Debian Local Security Checks | medium |