GSD-2021-20270
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.
Aliases
Aliases
{
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"alias": "CVE-2021-20270",
"description": "An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the \"exception\" keyword.",
"id": "GSD-2021-20270",
"references": [
"https://www.suse.com/security/cve/CVE-2021-20270.html",
"https://www.debian.org/security/2021/dsa-4889",
"https://www.debian.org/security/2021/dsa-4870",
"https://access.redhat.com/errata/RHSA-2021:4151",
"https://access.redhat.com/errata/RHSA-2021:4150",
"https://access.redhat.com/errata/RHSA-2021:4139",
"https://access.redhat.com/errata/RHSA-2021:3252",
"https://access.redhat.com/errata/RHSA-2021:0781",
"https://ubuntu.com/security/CVE-2021-20270",
"https://advisories.mageia.org/CVE-2021-20270.html",
"https://security.archlinux.org/CVE-2021-20270",
"https://linux.oracle.com/cve/CVE-2021-20270.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"modified": "2023-12-13T01:23:12.024924Z",
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"gitlab.com": {
"advisories": [
{
"affected_range": "\u003e=1.5,\u003c=2.7.3",
"affected_versions": "All versions starting from 1.5 up to 2.7.3",
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"cwe_ids": [
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"CWE-835",
"CWE-937"
],
"date": "2021-12-10",
"description": "An infinite loop in SMLLexer in Pygments to may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the \"exception\" keyword.",
"fixed_versions": [
"2.7.4"
],
"identifier": "CVE-2021-20270",
"identifiers": [
"CVE-2021-20270"
],
"not_impacted": "All versions before 1.5, all versions after 2.7.3",
"package_slug": "pypi/Pygments",
"pubdate": "2021-03-23",
"solution": "Upgrade to version 2.7.4 or above.",
"title": "Loop with Unreachable Exit Condition (Infinite Loop)",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-20270",
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"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
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},
"lastModifiedDate": "2021-12-10T17:04Z",
"publishedDate": "2021-03-23T17:15Z"
}
}
}
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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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