ubuntu-cve-2018-14647
Vulnerability from osv_ubuntu
Published
2018-09-24 00:00
Modified
2026-04-22 07:38
Summary
Details
Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat's internal data structures, consuming large amounts CPU and RAM. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.
Severity
7.5 (High)
5.3 (Medium)
7.5 (High)
N/A (UNKNOWN)
References
{
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"versions": [
"3.7.0~a2-1",
"3.7.0~a3-1",
"3.7.0~a3-2",
"3.7.0~a3-3",
"3.7.0~a4-1",
"3.7.0~b1-1",
"3.7.0~b1-1build1",
"3.7.0~b2-1",
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],
"aliases": [],
"details": "Python\u0027s elementtree C accelerator failed to initialise Expat\u0027s hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat\u0027s internal data structures, consuming large amounts CPU and RAM. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.",
"id": "UBUNTU-CVE-2018-14647",
"modified": "2026-04-22T07:38:42Z",
"published": "2018-09-24T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-14647"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3817-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3817-2"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-14647"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6891-1"
}
],
"related": [
"USN-3817-1",
"USN-3817-2",
"USN-6891-1"
],
"schema_version": "1.7.0",
"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": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2018-14647"
]
}
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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.
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