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medium5.9

CVE-2021-23336

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 W…

Impact

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.

Affected products

VendorProductAffected versions
PythonPython
before 3.6.13
from 3.7.0 before 3.7.10
from 3.8.0 before 3.8.8
from 3.9.0 before 3.9.2
FedoraprojectFedora
Versions 32, 33, 34
DebianDebian Linux
Version 9.0
NetappCloud Backup
All versions
NetappInventory Collect Tool
All versions
NetappOntap Select Deploy Administration Utility
All versions
NetappSnapcenter
All versions
DjangoprojectDjango
from 2.2 before 2.2.19
from 3.0 before 3.0.13
from 3.1 before 3.1.7
OracleCommunications Offline Mediation Controller
Version 12.0.0.3.0
OracleCommunications Pricing Design Center
Version 12.0.0.3.0
OracleEnterprise Manager Ops Center
Version 12.4.0.0
OracleZfs Storage Appliance
Version 8.8

Weakness classification

CWE-444

References