CVEvulnerability

CVE-2021-23336

5.9 MEDIUM Published 2021-02-15 Modified 2026-10-14 Official page ↗
Status
Modified
Published
2021-02-15
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
CVSS 2.0 ([email protected])
4.0 MEDIUM — AV:N/AC:H/Au:N/C:N/I:P/A:P
Weaknesses
CWE-444

Description

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 configurations

• python python (< 3.6.13) • python python (>= 3.7.0 < 3.7.10) • python python (>= 3.8.0 < 3.8.8) • python python (>= 3.9.0 < 3.9.2) • fedoraproject fedora 32 • fedoraproject fedora 33 • fedoraproject fedora 34 • debian debian linux 9.0 • netapp cloud backup • netapp inventory collect tool • netapp ontap select deploy administration utility • netapp snapcenter • djangoproject django (>= 2.2 < 2.2.19) • djangoproject django (>= 3.0 < 3.0.13) • djangoproject django (>= 3.1 < 3.1.7) • oracle communications offline mediation controller 12.0.0.3.0 • oracle communications pricing design center 12.0.0.3.0 • oracle enterprise manager ops center 12.4.0.0 • oracle zfs storage appliance 8.8

Related

Weakness · CWE (1)

  • CWE-444 Inconsistent Interpretation of HTTP Requests weakness

References