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Vulnerability details: VCID-ff6w-cn4h-aaak
Vulnerability ID VCID-ff6w-cn4h-aaak
Aliases CVE-2020-14311
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-190 Integer Overflow or Wraparound
CWE-122 Heap-based Buffer Overflow
System Score Found at
generic_textual High http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-14311.html
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3216
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3217
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3223
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3227
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3271
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3273
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3274
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3275
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3276
cvssv3 5.7 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-14311.json
epss 0.00027 https://api.first.org/data/v1/epss?cve=CVE-2020-14311
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epss 0.00050 https://api.first.org/data/v1/epss?cve=CVE-2020-14311
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1852014
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10713
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14308
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14309
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14310
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14311
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15706
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15707
cvssv3.1 5.7 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual Medium https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
cvssv2 3.6 https://nvd.nist.gov/vuln/detail/CVE-2020-14311
cvssv3 6.0 https://nvd.nist.gov/vuln/detail/CVE-2020-14311
cvssv3.1 6.0 https://nvd.nist.gov/vuln/detail/CVE-2020-14311
generic_textual Medium https://ubuntu.com/security/notices/USN-4432-1
generic_textual Medium https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
generic_textual Medium https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
generic_textual Medium https://www.openwall.com/lists/oss-security/2020/07/29/3
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-14311.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-14311.json
https://api.first.org/data/v1/epss?cve=CVE-2020-14311
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10713
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14308
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14309
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14310
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14311
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15706
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15707
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
https://security.gentoo.org/glsa/202104-05
https://ubuntu.com/security/notices/USN-4432-1
https://usn.ubuntu.com/4432-1/
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
https://www.openwall.com/lists/oss-security/2020/07/29/3
http://www.openwall.com/lists/oss-security/2021/09/17/2
http://www.openwall.com/lists/oss-security/2021/09/17/4
http://www.openwall.com/lists/oss-security/2021/09/21/1
1852014 https://bugzilla.redhat.com/show_bug.cgi?id=1852014
cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*
CVE-2020-14311 https://nvd.nist.gov/vuln/detail/CVE-2020-14311
RHSA-2020:3216 https://access.redhat.com/errata/RHSA-2020:3216
RHSA-2020:3217 https://access.redhat.com/errata/RHSA-2020:3217
RHSA-2020:3223 https://access.redhat.com/errata/RHSA-2020:3223
RHSA-2020:3227 https://access.redhat.com/errata/RHSA-2020:3227
RHSA-2020:3271 https://access.redhat.com/errata/RHSA-2020:3271
RHSA-2020:3273 https://access.redhat.com/errata/RHSA-2020:3273
RHSA-2020:3274 https://access.redhat.com/errata/RHSA-2020:3274
RHSA-2020:3275 https://access.redhat.com/errata/RHSA-2020:3275
RHSA-2020:3276 https://access.redhat.com/errata/RHSA-2020:3276
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-14311.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:L/AC:L/Au:N/C:N/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-14311
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-14311
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-14311
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.04621
EPSS Score 0.00027
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.