gsd-2021-27291
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-27291",
"description": "In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.",
"id": "GSD-2021-27291",
"references": [
"https://www.suse.com/security/cve/CVE-2021-27291.html",
"https://www.debian.org/security/2021/dsa-4889",
"https://www.debian.org/security/2021/dsa-4878",
"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-2021-27291",
"https://advisories.mageia.org/CVE-2021-27291.html",
"https://security.archlinux.org/CVE-2021-27291",
"https://linux.oracle.com/cve/CVE-2021-27291.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
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],
"details": "In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.",
"id": "GSD-2021-27291",
"modified": "2023-12-13T01:23:35.936826Z",
"schema_version": "1.4.0"
}
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"gitlab.com": {
"advisories": [
{
"affected_range": "\u003e=1.1,\u003c2.7.4",
"affected_versions": "All versions starting from 1.1 before 2.7.4",
"cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"cwe_ids": [
"CWE-1035",
"CWE-1333",
"CWE-937"
],
"date": "2023-08-08",
"description": "In pygments the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and is vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.",
"fixed_versions": [
"2.7.4"
],
"identifier": "CVE-2021-27291",
"identifiers": [
"CVE-2021-27291"
],
"not_impacted": "All versions before 1.1, all versions starting from 2.7.4",
"package_slug": "pypi/Pygments",
"pubdate": "2021-03-17",
"solution": "Upgrade to version 2.7.4 or above.",
"title": "Uncontrolled Resource Consumption",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-27291"
],
"uuid": "ae31c2cb-26c5-4e6f-85db-15c6982e4e17"
}
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"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
"baseMetricV3": {
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"exploitabilityScore": 3.9,
"impactScore": 3.6
}
},
"lastModifiedDate": "2022-05-23T22:35Z",
"publishedDate": "2021-03-17T13:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.