CVE-2020-14311 (GCVE-0-2020-14311)
Vulnerability from cvelistv5 – Published: 2020-07-31 20:56 – Updated: 2024-08-04 12:39
VLAI
EPSS
VEX
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.
Severity
5.7 (Medium)
Assigner
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 | CPE status | |
|---|---|---|---|---|
| The Grub2 Project | grub2 |
Affected:
2.06
|
guessed |
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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-02-23T18:17:36+00:00",
"cve": "CVE-2020-14311",
"id": "CVE-2020-14311",
"initial_release_date": "2020-07-29T17:00:00+00:00",
"product_status:fixed": "1277",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-14311.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T02:23:07Z",
"cve": "CVE-2020-14311",
"id": "CVE-2020-14311",
"initial_release_date": "2023-02-15T03:57:53Z",
"product_status:known_affected": "105",
"product_status:recommended": "769",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2020-14311",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-14311.json",
"version": "23"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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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.
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