USN-4851-1 (UBUNTU-CVE-2018-20532)
Vulnerability from osv_ubuntu – Published: 2021-03-15 22:36 – Updated: 2026-06-25 10:45 – Source website
VLAI
Summary
libsolv vulnerabilities
Details
It was discovered that Libsolv incorrectly handled certain malformed input. An attacker could use this issue to cause Libsolv to crash, resulting in a denial of service.
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2018-20532",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-20533",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-20534",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv0",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "libsolvext0",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "python-solv",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
},
{
"binary_name": "python3-solv",
"binary_version": "0.6.11-1.1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.6.11-1.1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.6.11-1.1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.6.11-1",
"0.6.11-1build1",
"0.6.11-1.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2018-20532",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-20533",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-20534",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libsolv-perl",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv-tools",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "libsolv0",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "libsolvext0",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "python-solv",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
},
{
"binary_name": "python3-solv",
"binary_version": "0.6.30-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "libsolv",
"purl": "pkg:deb/ubuntu/libsolv@0.6.30-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.6.30-1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.6.28-2build1",
"0.6.30-1build1"
]
}
],
"aliases": [],
"details": "It was discovered that Libsolv incorrectly handled certain malformed input.\nAn attacker could use this issue to cause Libsolv to crash, resulting in a\ndenial of service.",
"id": "USN-4851-1",
"modified": "2026-06-25T10:45:59Z",
"published": "2021-03-15T22:36:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4851-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-20532"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-20533"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-20534"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "libsolv vulnerabilities",
"upstream": [
"UBUNTU-CVE-2018-20532",
"UBUNTU-CVE-2018-20533",
"UBUNTU-CVE-2018-20534"
]
}
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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.
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- 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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