USN-5379-1 (UBUNTU-CVE-2021-31870)
Vulnerability from osv_ubuntu – Published: 2022-04-18 11:37 – Updated: 2026-06-29 10:52 – Source website
VLAI
Summary
klibc vulnerabilities
Details
It was discovered that klibc did not properly perform some mathematical operations, leading to an integer overflow. An attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-31870)
It was discovered that klibc did not properly handled some memory allocations on 64 bit systems. An attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-31871)
It was discovered that klibc did not properly handled some file sizes values on 32 bit systems. An attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-31872)
It was discovered that klibc did not properly handled some memory allocations. An attacker could possibly use this issue to cause a crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-31873)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-31870",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31871",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31872",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31873",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:14.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.3-0ubuntu1.14.04.3+esm2"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.3-0ubuntu1.14.04.3+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.3-0ubuntu1.14.04.3+esm2?arch=source\u0026distro=trusty/esm"
},
"ranges": [
{
"events": [
{
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},
{
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}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.1-3.1ubuntu2",
"2.0.2-1ubuntu1",
"2.0.2-1ubuntu2",
"2.0.3-0ubuntu1",
"2.0.3-0ubuntu1.14.04.1",
"2.0.3-0ubuntu1.14.04.2",
"2.0.3-0ubuntu1.14.04.3"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-31870",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31871",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31872",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31873",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.4-8ubuntu1.16.04.4+esm1"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.4-8ubuntu1.16.04.4+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.4-8ubuntu1.16.04.4+esm1?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.4-8ubuntu1.16.04.4+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.3-0ubuntu1",
"2.0.4-4",
"2.0.4-6",
"2.0.4-7",
"2.0.4-8",
"2.0.4-8ubuntu1",
"2.0.4-8ubuntu1.16.04.1",
"2.0.4-8ubuntu1.16.04.2",
"2.0.4-8ubuntu1.16.04.3",
"2.0.4-8ubuntu1.16.04.4"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-31870",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31871",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31872",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31873",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.4-9ubuntu2.1"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.4-9ubuntu2.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.4-9ubuntu2.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.4-9ubuntu2.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.4-9ubuntu1",
"2.0.4-9ubuntu2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-31870",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31871",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31872",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-31873",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.7-1ubuntu5.1"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.7-1ubuntu5.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.7-1ubuntu5.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.7-1ubuntu5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.6-1ubuntu1",
"2.0.6-1ubuntu2",
"2.0.7-1ubuntu1",
"2.0.7-1ubuntu3",
"2.0.7-1ubuntu4",
"2.0.7-1ubuntu5"
]
}
],
"aliases": [],
"details": "It was discovered that klibc did not properly perform\nsome mathematical operations, leading to an integer overflow.\nAn attacker could possibly use this issue to cause a crash,\nresulting in a denial of service, or possibly execute\narbitrary code. (CVE-2021-31870)\n\nIt was discovered that klibc did not properly handled some\nmemory allocations on 64 bit systems. An attacker could\npossibly use this issue to cause a crash, resulting in a\ndenial of service, or possibly execute arbitrary code.\n(CVE-2021-31871)\n\nIt was discovered that klibc did not properly handled some file\nsizes values on 32 bit systems. An attacker could possibly use\nthis issue to cause a crash, resulting in a denial of service,\nor possibly execute arbitrary code. (CVE-2021-31872)\n\nIt was discovered that klibc did not properly handled some\nmemory allocations. An attacker could possibly use this issue\nto cause a crash, resulting in a denial of service, or possibly\nexecute arbitrary code. (CVE-2021-31873)\n",
"id": "USN-5379-1",
"modified": "2026-06-29T10:52:54Z",
"published": "2022-04-18T11:37:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5379-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-31870"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-31871"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-31872"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-31873"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "klibc vulnerabilities",
"upstream": [
"UBUNTU-CVE-2021-31870",
"UBUNTU-CVE-2021-31871",
"UBUNTU-CVE-2021-31872",
"UBUNTU-CVE-2021-31873"
]
}
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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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