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.
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Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: snyk
Published: 2021-02-15T12:15:20.788790Z
Updated: 2024-09-16T18:55:19.315Z
Reserved: 2021-01-08T00:00:00
Link: CVE-2021-23336
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-02-15T13:15:12.433
Modified: 2024-11-21T05:51:31.403
Link: CVE-2021-23336
Redhat