GSD-2020-28493
Vulnerability from gsd - Updated: 2023-12-13 01:22Details
This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-28493",
"description": "This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.",
"id": "GSD-2020-28493",
"references": [
"https://www.suse.com/security/cve/CVE-2020-28493.html",
"https://access.redhat.com/errata/RHSA-2021:4162",
"https://access.redhat.com/errata/RHSA-2021:4161",
"https://access.redhat.com/errata/RHSA-2021:4151",
"https://access.redhat.com/errata/RHSA-2021:3254",
"https://access.redhat.com/errata/RHSA-2021:3252",
"https://advisories.mageia.org/CVE-2020-28493.html",
"https://security.archlinux.org/CVE-2020-28493",
"https://linux.oracle.com/cve/CVE-2020-28493.html",
"https://ubuntu.com/security/CVE-2020-28493"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2020-28493"
],
"details": "This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.",
"id": "GSD-2020-28493",
"modified": "2023-12-13T01:22:01.417918Z",
"schema_version": "1.4.0"
}
},
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"ASSIGNER": "report@snyk.io",
"DATE_PUBLIC": "2021-02-01T19:29:26.819563Z",
"ID": "CVE-2020-28493",
"STATE": "PUBLIC",
"TITLE": "Regular Expression Denial of Service (ReDoS)"
},
"affects": {
"vendor": {
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"product": {
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"product_name": "jinja2",
"version": {
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"version_value": "0.0.0"
},
{
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"version_value": "2.11.3"
}
]
}
}
]
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"credit": [
{
"lang": "eng",
"value": "Yeting Li"
}
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"description": {
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"value": "This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"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:L/E:P",
"version": "3.1"
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"references": {
"reference_data": [
{
"name": "https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994",
"refsource": "MISC",
"url": "https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994"
},
{
"name": "https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20",
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"url": "https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20"
},
{
"name": "https://github.com/pallets/jinja/pull/1343",
"refsource": "MISC",
"url": "https://github.com/pallets/jinja/pull/1343"
},
{
"name": "FEDORA-2021-2ab8ebcabc",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/"
},
{
"name": "GLSA-202107-19",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202107-19"
}
]
}
},
"gitlab.com": {
"advisories": [
{
"affected_range": "\u003c2.11.3",
"affected_versions": "All versions before 2.11.3",
"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:L",
"cwe_ids": [
"CWE-1035",
"CWE-937"
],
"date": "2021-07-21",
"description": "The ReDOS vulnerability of the regex is mainly due to the sub-pattern `[a-zA-Z0-9._-]+.[a-zA-Z0-9._-]+` This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.",
"fixed_versions": [
"2.11.3"
],
"identifier": "CVE-2020-28493",
"identifiers": [
"CVE-2020-28493"
],
"not_impacted": "All versions starting from 2.11.3",
"package_slug": "pypi/Jinja2",
"pubdate": "2021-02-01",
"solution": "Upgrade to version 2.11.3 or above.",
"title": "Regular Expression Denial of Service",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2020-28493"
],
"uuid": "17c4602a-c0ae-48d0-96f6-08c84d55d0cb"
}
]
},
"nvd.nist.gov": {
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"operator": "OR"
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"description": {
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"value": "This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory."
}
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"refsource": "MISC",
"tags": [
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"url": "https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20"
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{
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"url": "https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994"
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"accessVector": "NETWORK",
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"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
},
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"attackVector": "NETWORK",
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"version": "3.1"
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"impactScore": 1.4
}
},
"lastModifiedDate": "2022-04-08T14:05Z",
"publishedDate": "2021-02-01T20:15Z"
}
}
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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