CVE-20XX-?
agent?

CVE-2021-23336

5.9 MEDIUM 41% exploit odds Fix listed Other Library

What it is

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.

At a glance

Exploitability
Can be exploited over the network without logging in, but needs a user to act. High risk of service disruption.
Exploit odds
40.7% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix
A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

  1. PublishedDisclosed publicly on CVE.org and NVD
  2. Last updatedMost recent change to the record

Why it ranks here

Details

Published
Last modified
Exploit probability
40.7% · EPSS, next 30 days
Weakness
CWE-444
Record status
Modified

Affected

Attack profile CVSS 3.1 · 5.9

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Raw vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-23336.md and follow it. Check whether this project is affected by CVE-2021-23336. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record