6.0
MEDIUM
CVE-2020-14311
Grub2 Symlink Heap Overflow Vulnerability
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.

INFO

Published Date :

July 31, 2020, 10:15 p.m.

Last Modified :

Nov. 7, 2023, 3:17 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.2

Exploitability Score :

0.8
Public PoC/Exploit Available at Github

CVE-2020-14311 has a 23 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-14311 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat enterprise_linux
2 Redhat enterprise_linux_server_aus
3 Redhat enterprise_linux_server_tus
4 Redhat enterprise_linux_eus
1 Canonical ubuntu_linux
1 Opensuse leap
1 Gnu grub2
: Total Affected Vendor : 4 | Products : 7
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-14311.

URL Resource
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/17/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/17/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/21/1 Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311 Issue Tracking Third Party Advisory
https://security.gentoo.org/glsa/202104-05 Third Party Advisory
https://usn.ubuntu.com/4432-1/ Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
zeetim/shim-review

None

Dockerfile Makefile

Updated: 1 week, 6 days ago
0 stars 0 fork 0 watcher
Born at : Sept. 6, 2024, 10:39 a.m. This repo has been linked 28 different CVEs too.
Profile Photo
baramundisoftware/ShimReview_2024

None

Dockerfile

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : May 23, 2024, 1:34 p.m. This repo has been linked 28 different CVEs too.
Profile Photo
ctrliq/shim-review

None

Updated: 4 months ago
0 stars 0 fork 0 watcher
Born at : May 17, 2024, 8:53 p.m. This repo has been linked 24 different CVEs too.
Profile Photo
ctrliq/ciq-shim-build

None

Dockerfile Shell

Updated: 4 months ago
0 stars 1 fork 1 watcher
Born at : May 17, 2024, 8:46 p.m. This repo has been linked 28 different CVEs too.
Profile Photo
Rodrigo-NR/shim-review

None

Dockerfile

Updated: 3 months ago
0 stars 0 fork 0 watcher
Born at : March 4, 2024, 8:25 p.m. This repo has been linked 28 different CVEs too.
Profile Photo
Jurij-Ivastsuk/WAXAR-shim-review

Repository for all information needed for shim-review

Dockerfile

Updated: 8 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 15, 2024, 9:57 a.m. This repo has been linked 28 different CVEs too.
Profile Photo
NaverCloudPlatform/shim-review

shim-review for Navix

Dockerfile

Updated: 11 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : Aug. 28, 2023, 8:02 a.m. This repo has been linked 28 different CVEs too.
Profile Photo
neppe/shim-review

None

Updated: 1 year, 3 months ago
0 stars 0 fork 0 watcher
Born at : May 28, 2023, 10:13 a.m. This repo has been linked 24 different CVEs too.
Profile Photo
lenovo-lux/shim-review

None

Dockerfile Makefile

Updated: 7 months, 2 weeks ago
1 stars 0 fork 0 watcher
Born at : Dec. 14, 2022, 11:14 p.m. This repo has been linked 24 different CVEs too.
Profile Photo
ozun215/shim-review

None

Dockerfile

Updated: 1 year, 5 months ago
0 stars 0 fork 0 watcher
Born at : July 15, 2022, 6:34 a.m. This repo has been linked 22 different CVEs too.
Profile Photo
EuroLinux/shim-review

None

Dockerfile

Updated: 2 years, 2 months ago
0 stars 0 fork 0 watcher
Born at : July 2, 2022, 8:27 p.m. This repo has been linked 24 different CVEs too.
Profile Photo
mwti/rescueshim

None

Updated: 2 years, 4 months ago
0 stars 0 fork 0 watcher
Born at : May 8, 2022, 12:58 p.m. This repo has been linked 14 different CVEs too.
Profile Photo
synackcyber/BootHole_Fix

None

PowerShell

Updated: 2 years, 8 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 4, 2022, 10 p.m. This repo has been linked 16 different CVEs too.
Profile Photo
luojc123/shim-nsdl

None

Dockerfile

Updated: 2 years, 9 months ago
0 stars 0 fork 0 watcher
Born at : Nov. 30, 2021, 7:33 a.m. This repo has been linked 14 different CVEs too.
Profile Photo
amzdev0401/shim-review-backup

None

Dockerfile Shell

Updated: 2 years, 9 months ago
0 stars 0 fork 0 watcher
Born at : Oct. 1, 2021, 3:29 a.m. This repo has been linked 14 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-14311 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-14311 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Removed CVSS V3 Red Hat, Inc. AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
    Added CVSS V3.1 Red Hat, Inc. AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
  • Modified Analysis by [email protected]

    Oct. 19, 2021

    Action Type Old Value New Value
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html Mailing List, Third Party Advisory
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html Mailing List, Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/09/17/2 No Types Assigned http://www.openwall.com/lists/oss-security/2021/09/17/2 Mailing List, Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/09/17/4 No Types Assigned http://www.openwall.com/lists/oss-security/2021/09/17/4 Mailing List, Third Party Advisory
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/09/21/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/09/21/1 Mailing List, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/202104-05 No Types Assigned https://security.gentoo.org/glsa/202104-05 Third Party Advisory
    Changed Reference Type https://usn.ubuntu.com/4432-1/ No Types Assigned https://usn.ubuntu.com/4432-1/ Third Party Advisory
    Removed CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
  • CVE Modified by [email protected]

    Sep. 21, 2021

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2021/09/21/1 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 17, 2021

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2021/09/17/4 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 17, 2021

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2021/09/17/2 [No Types Assigned]
  • CVE Modified by [email protected]

    May. 01, 2021

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202104-05 [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 08, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html [No Types Assigned]
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 04, 2020

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/4432-1/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Aug. 04, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311 Issue Tracking, Third Party Advisory
    Added CWE NIST CWE-787
    Added CWE NIST CWE-190
    Added CPE Configuration OR *cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* versions up to (excluding) 2.06
    Added CPE Configuration 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:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-14311 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-14311 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.05 }} 0.00%

score

0.16459

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: