CVE Vulnerability

CVE-2021-33026

** DISPUTED ** The Flask-Caching extension through 1.10.1 for Flask relies on Pickle for serialization, which may lead to remote code execution or local privilege escalation. If an attacker gains access to cache storage (e.g., filesystem, Memcached, Redis, etc.), they can construct a crafted payload, poison the cache, and execute Python code. NOTE: a third party indicates that exploitation is extremely unlikely unless the machine is already compromised; in other cases, the attacker would be unable to write their payload to the cache and generate the required collision.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/sh4nks/flask-caching/pull/209 Patch Third Party Advisory
https://github.com/pallets-eco/flask-caching/pull/209#issuecomment-1136397937 Issue Tracking Patch
Configurations

Configuration 1

cpe:2.3:a:flask-caching_project:flask-caching:*:*:*:*:*:flask:*:*
Information

Published : 2021-05-13 11:15

Updated : 2022-10-28 07:03

NVD link : CVE-2021-33026

Mitre link : CVE-2021-33026

Products Affected
No products.
CWE
CWE-502

Deserialization of Untrusted Data