Maple Labs

CVE search · CVE-2021-23336

CVE-2021-23336

medium 5.9

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.

Open in the NVD CVE.org JSON

Details

Status
Modified
Published
Last changed
Source
report@snyk.io
Weakness
CWE-444

Severity

VersionScoreVectorSource
CVSS 3.1 medium 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H report@snyk.ioSecondary
CVSS 3.1 medium 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H nvd@nist.govPrimary
CVSS 2.0 medium 4.0 AV:N/AC:H/Au:N/C:N/I:P/A:P nvd@nist.govPrimary

Affected products

Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.

References