GSD-2021-23336
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-23336",
"description": "The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.",
"id": "GSD-2021-23336",
"references": [
"https://www.suse.com/security/cve/CVE-2021-23336.html",
"https://access.redhat.com/errata/RHSA-2021:4162",
"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://access.redhat.com/errata/RHSA-2021:1633",
"https://ubuntu.com/security/CVE-2021-23336",
"https://advisories.mageia.org/CVE-2021-23336.html",
"https://security.archlinux.org/CVE-2021-23336",
"https://alas.aws.amazon.com/cve/html/CVE-2021-23336.html",
"https://linux.oracle.com/cve/CVE-2021-23336.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-23336"
],
"details": "The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.",
"id": "GSD-2021-23336",
"modified": "2023-12-13T01:23:30.134155Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
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"TITLE": "Web Cache Poisoning"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "python/cpython",
"version": {
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"version_affected": "\u003e=",
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"value": "Snyk Security Team"
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}
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"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H/E:P/RL:U/RC:C",
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"name": "https://snyk.io/vuln/SNYK-UPSTREAM-PYTHONCPYTHON-1074933",
"refsource": "MISC",
"url": "https://snyk.io/vuln/SNYK-UPSTREAM-PYTHONCPYTHON-1074933"
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"name": "https://github.com/python/cpython/pull/24297",
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"url": "https://github.com/python/cpython/pull/24297"
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"url": "https://snyk.io/blog/cache-poisoning-in-popular-open-source-packages/"
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"gitlab.com": {
"advisories": [
{
"affected_range": "\u003e=2.2,\u003c2.2.19||\u003e=3.0,\u003c3.0.13||\u003e=3.1,\u003c3.1.7",
"affected_versions": "All versions starting from 2.2 before 2.2.19, all versions starting from 3.0 before 3.0.13, all versions starting from 3.1 before 3.1.7",
"cvss_v2": "AV:N/AC:H/Au:N/C:N/I:P/A:P",
"cvss_v3": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H",
"cwe_ids": [
"CWE-1035",
"CWE-444",
"CWE-937"
],
"date": "2022-03-04",
"description": "When the attacker can separate query parameters using a semicolon (`;`), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.",
"fixed_versions": [
"2.2.19",
"3.0.13",
"3.1.7"
],
"identifier": "CVE-2021-23336",
"identifiers": [
"CVE-2021-23336"
],
"not_impacted": "All versions before 2.2, all versions starting from 2.2.19 before 3.0, all versions starting from 3.0.13 before 3.1, all versions starting from 3.1.7",
"package_slug": "pypi/Django",
"pubdate": "2021-02-15",
"solution": "Upgrade to versions 2.2.19, 3.0.13, 3.1.7 or above.",
"title": "Inconsistent Interpretation of HTTP Requests (HTTP Request Smuggling)",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-23336"
],
"uuid": "449767c6-4b64-41f7-bdeb-7eae216d0671"
}
]
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},
{
"name": "[oss-security] 20210219 Django security releases: CVE-2021-23336: Web cache poisoning via ``django.utils.http.limited_parse_qsl()``",
"refsource": "MLIST",
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{
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{
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},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "HIGH",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.0,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:H/Au:N/C:N/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 4.9,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": true
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 4.2
}
},
"lastModifiedDate": "2023-09-20T22:15Z",
"publishedDate": "2021-02-15T13:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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