Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python | Python | < 3.6.13 |
| Fedoraproject | Fedora | 32 |
| 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 |
| 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 Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/02/19/4Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/01/2Mailing ListThird Party Advisory
- https://github.com/python/cpython/pull/24297PatchThird Party Advisory
- https://lists.apache.org/thread.html/ra8ce70088ba291f358e077cafdb14d174b7a1ce9a9
- https://lists.apache.org/thread.html/rc005f4de9d9b0ba943ceb8ff5a21a5c6ff8a9df526
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430
- https://lists.debian.org/debian-lts-announce/2021/02/msg00030.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00005.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00015.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2021-23336?
CVE-2021-23336 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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...
How severe is CVE-2021-23336?
CVE-2021-23336 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-23336?
Check the references section above for vendor advisories and patch information. Affected products include: Python Python, Fedoraproject Fedora, Debian Debian Linux, Netapp Cloud Backup, Netapp Inventory Collect Tool.