gsd-2021-3733
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.
Aliases
Aliases
{ "GSD": { "alias": "CVE-2021-3733", "description": "There\u0027s a flaw in urllib\u0027s AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.", "id": "GSD-2021-3733", "references": [ "https://www.suse.com/security/cve/CVE-2021-3733.html", "https://access.redhat.com/errata/RHSA-2021:4160", "https://access.redhat.com/errata/RHSA-2021:4057", "https://access.redhat.com/errata/RHSA-2021:3254", "https://ubuntu.com/security/CVE-2021-3733", "https://advisories.mageia.org/CVE-2021-3733.html", "https://alas.aws.amazon.com/cve/html/CVE-2021-3733.html", "https://linux.oracle.com/cve/CVE-2021-3733.html", "https://access.redhat.com/errata/RHSA-2022:1663", "https://access.redhat.com/errata/RHSA-2022:1764", "https://access.redhat.com/errata/RHSA-2022:1821" ] }, "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2021-3733" ], "details": "There\u0027s a flaw in urllib\u0027s AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.", "id": "GSD-2021-3733", "modified": "2023-12-13T01:23:35.350801Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "secalert@redhat.com", "ID": "CVE-2021-3733", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "python", "version": { "version_data": [ { "version_value": "Fixed in python v3.6.14, python v3.7.11, python v3.8.10, python v3.9.5." } ] } } ] }, "vendor_name": "n/a" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "There\u0027s a flaw in urllib\u0027s AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-400 - Uncontrolled Resource Consumption" } ] } ] }, "references": { "reference_data": [ { "name": "https://bugs.python.org/issue43075", "refsource": "MISC", "url": "https://bugs.python.org/issue43075" }, { "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1995234", "refsource": "MISC", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1995234" }, { "name": "https://github.com/python/cpython/pull/24391", "refsource": "MISC", "url": "https://github.com/python/cpython/pull/24391" }, { "name": "https://ubuntu.com/security/CVE-2021-3733", "refsource": "MISC", "url": "https://ubuntu.com/security/CVE-2021-3733" }, { "name": "https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb", "refsource": "MISC", "url": "https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb" }, { "name": 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Sightings
Author | Source | Type | Date |
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Nomenclature
- 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.