Vulnerability-Lookup

FKIE_CVE-2020-14311

Vulnerability from fkie_nvd - Published: 2020-07-31 22:15 - Updated: 2026-06-17 02:54

Severity

5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
6.0 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

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.

References

URL	Tags
secalert@redhat.com	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	Mailing List, Third Party Advisory
secalert@redhat.com	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	Mailing List, Third Party Advisory
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2021/09/17/2	Mailing List, Third Party Advisory
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2021/09/17/4	Mailing List, Third Party Advisory
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2021/09/21/1	Mailing List, Third Party Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311	Issue Tracking, Third Party Advisory
secalert@redhat.com	https://security.gentoo.org/glsa/202104-05	Third Party Advisory
secalert@redhat.com	https://usn.ubuntu.com/4432-1/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/09/17/2	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/09/17/4	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/09/21/1	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311	Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://security.gentoo.org/glsa/202104-05	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://usn.ubuntu.com/4432-1/	Third Party Advisory

Impacted products

Vendor	Product	Version
gnu	grub2	*
redhat	enterprise_linux	7.0
redhat	enterprise_linux	8.0
redhat	enterprise_linux_eus	8.1
redhat	enterprise_linux_eus	8.2
redhat	enterprise_linux_server_aus	8.2
redhat	enterprise_linux_server_tus	8.2
opensuse	leap	15.1
opensuse	leap	15.2
canonical	ubuntu_linux	14.04
canonical	ubuntu_linux	16.04
canonical	ubuntu_linux	18.04
canonical	ubuntu_linux	20.04

JSON

To clipboard

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    },
    {
      "lang": "es",
      "value": "Se presenta un problema con grub2 versiones anteriores a 2.06, mientras se maneja un symlink en los sistemas de archivos ext. Un sistema de archivos que contiene un enlace simb\u00f3lico con un tama\u00f1o de inode de UINT32_MAX causa un desbordamiento aritm\u00e9tico conllevando a una asignaci\u00f3n de memoria de tama\u00f1o cero con el posterior desbordamiento del b\u00fafer en la regi\u00f3n heap de la memoria"
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  ],
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  "lastModified": "2026-06-17T02:54:30.877",
  "metrics": {
    "cvssMetricV2": [
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        "acInsufInfo": false,
        "baseSeverity": "LOW",
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          "baseScore": 5.7,
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          "confidentialityImpact": "NONE",
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  "published": "2020-07-31T22:15:11.597",
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}

CVE-2020-14311 (GCVE-0-2020-14311)

Vulnerability from cvelistv5 – Published: 2020-07-31 20:56 – Updated: 2024-08-04 12:39

Summary

Severity

5.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

CWE

Assigner

redhat redhat root

References

8 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2…	x_refsource_CONFIRM
https://usn.ubuntu.com/4432-1/	vendor-advisoryx_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://security.gentoo.org/glsa/202104-05	vendor-advisoryx_refsource_GENTOO
http://www.openwall.com/lists/oss-security/2021/09/17/2	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/4	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/21/1	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version
The Grub2 Project	grub2	Affected: 2.06

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

FKIE_CVE-2020-14311

CVE-2020-14311 (GCVE-0-2020-14311)

Tags

Sightings

Nomenclature

Related by attack behaviour