pysec-2023-212
Vulnerability from pysec
urllib3 is a user-friendly HTTP client library for Python. urllib3 previously wouldn't remove the HTTP request body when an HTTP redirect response using status 301, 302, or 303 after the request had its method changed from one that could accept a request body (like POST) to GET as is required by HTTP RFCs. Although this behavior is not specified in the section for redirects, it can be inferred by piecing together information from different sections and we have observed the behavior in other major HTTP client implementations like curl and web browsers. Because the vulnerability requires a previously trusted service to become compromised in order to have an impact on confidentiality we believe the exploitability of this vulnerability is low. Additionally, many users aren't putting sensitive data in HTTP request bodies, if this is the case then this vulnerability isn't exploitable. Both of the following conditions must be true to be affected by this vulnerability: 1. Using urllib3 and submitting sensitive information in the HTTP request body (such as form data or JSON) and 2. The origin service is compromised and starts redirecting using 301, 302, or 303 to a malicious peer or the redirected-to service becomes compromised. This issue has been addressed in versions 1.26.18 and 2.0.7 and users are advised to update to resolve this issue. Users unable to update should disable redirects for services that aren't expecting to respond with redirects with redirects=False and disable automatic redirects with redirects=False and handle 301, 302, and 303 redirects manually by stripping the HTTP request body.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "urllib3",
"purl": "pkg:pypi/urllib3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4e98d57809dacab1cbe625fddeec1a290c478ea9"
}
],
"repo": "https://github.com/urllib3/urllib3",
"type": "GIT"
},
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.0.7"
},
{
"introduced": "0"
},
{
"fixed": "1.26.18"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.2",
"0.3",
"0.3.1",
"0.4.0",
"0.4.1",
"1.0",
"1.0.1",
"1.0.2",
"1.1",
"1.10",
"1.10.1",
"1.10.2",
"1.10.3",
"1.10.4",
"1.11",
"1.12",
"1.13",
"1.13.1",
"1.14",
"1.15",
"1.15.1",
"1.16",
"1.17",
"1.18",
"1.18.1",
"1.19",
"1.19.1",
"1.2",
"1.2.1",
"1.2.2",
"1.20",
"1.21",
"1.21.1",
"1.22",
"1.23",
"1.24",
"1.24.1",
"1.24.2",
"1.24.3",
"1.25",
"1.25.1",
"1.25.10",
"1.25.11",
"1.25.2",
"1.25.3",
"1.25.4",
"1.25.5",
"1.25.6",
"1.25.7",
"1.25.8",
"1.25.9",
"1.26.0",
"1.26.1",
"1.26.10",
"1.26.11",
"1.26.12",
"1.26.13",
"1.26.14",
"1.26.15",
"1.26.16",
"1.26.17",
"1.26.2",
"1.26.3",
"1.26.4",
"1.26.5",
"1.26.6",
"1.26.7",
"1.26.8",
"1.26.9",
"1.3",
"1.4",
"1.5",
"1.6",
"1.7",
"1.7.1",
"1.8",
"1.8.2",
"1.8.3",
"1.9",
"1.9.1",
"2.0.0",
"2.0.1",
"2.0.2",
"2.0.3",
"2.0.4",
"2.0.5",
"2.0.6"
]
}
],
"aliases": [
"CVE-2023-45803",
"GHSA-g4mx-q9vg-27p4"
],
"details": "urllib3 is a user-friendly HTTP client library for Python. urllib3 previously wouldn\u0027t remove the HTTP request body when an HTTP redirect response using status 301, 302, or 303 after the request had its method changed from one that could accept a request body (like `POST`) to `GET` as is required by HTTP RFCs. Although this behavior is not specified in the section for redirects, it can be inferred by piecing together information from different sections and we have observed the behavior in other major HTTP client implementations like curl and web browsers. Because the vulnerability requires a previously trusted service to become compromised in order to have an impact on confidentiality we believe the exploitability of this vulnerability is low. Additionally, many users aren\u0027t putting sensitive data in HTTP request bodies, if this is the case then this vulnerability isn\u0027t exploitable. Both of the following conditions must be true to be affected by this vulnerability: 1. Using urllib3 and submitting sensitive information in the HTTP request body (such as form data or JSON) and 2. The origin service is compromised and starts redirecting using 301, 302, or 303 to a malicious peer or the redirected-to service becomes compromised. This issue has been addressed in versions 1.26.18 and 2.0.7 and users are advised to update to resolve this issue. Users unable to update should disable redirects for services that aren\u0027t expecting to respond with redirects with `redirects=False` and disable automatic redirects with `redirects=False` and handle 301, 302, and 303 redirects manually by stripping the HTTP request body.\n",
"id": "PYSEC-2023-212",
"modified": "2023-10-25T18:28:34.811764+00:00",
"published": "2023-10-17T20:15:00+00:00",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/urllib3/urllib3/security/advisories/GHSA-g4mx-q9vg-27p4"
},
{
"type": "WEB",
"url": "https://www.rfc-editor.org/rfc/rfc9110.html#name-get"
},
{
"type": "FIX",
"url": "https://github.com/urllib3/urllib3/commit/4e98d57809dacab1cbe625fddeec1a290c478ea9"
},
{
"type": "ARTICLE",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PPDPLM6UUMN55ESPQWJFLLIZY4ZKCNRX/"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.