Bug 1961645 (CVE-2021-33026)

Summary: CVE-2021-33026 python-flask-caching: crafted payload may lead to remote code execution or local privilege escalation
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: lbrabec, qa-tools-sig
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2021-05-18 14:38:34 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1961646    
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Description Marian Rehak 2021-05-18 12:03:29 UTC
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.

Upstream Reference:


Comment 1 Marian Rehak 2021-05-18 12:04:18 UTC
Created python-flask-caching tracking bugs for this issue:

Affects: fedora-all [bug 1961646]

Comment 2 Product Security DevOps Team 2021-05-18 14:38:34 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.