Bug 2048995 (CVE-2022-21688)

Summary: CVE-2022-21688 onionshare: a DoS which quickly results in out-of-memory for the server
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: mail, pj.pandit
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: onionshare 2.5 Doc Type: If docs needed, set a value
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Last Closed: 2022-02-01 11:01:06 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2048996    
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Description Marian Rehak 2022-02-01 10:07:29 UTC 
Affected versions of the desktop application were found to be vulnerable to denial of service via an undisclosed vulnerability in the QT image parsing. Roughly 20 bytes lead to 2GB memory consumption and this can be triggered multiple times. To be abused, this vulnerability requires rendering in the history tab, so some user interaction is required. An adversary with knowledge of the Onion service address in public mode or with authentication in private mode can perform a Denial of Service attack, which quickly results in out-of-memory for the server. This requires the desktop application with rendered history, therefore the impact is only elevated. This issue has been patched in version 2.5.

Reference:

https://github.com/onionshare/onionshare/releases/tag/v2.5
https://github.com/onionshare/onionshare/security/advisories/GHSA-x7wr-283h-5h2v
Comment 1 Marian Rehak 2022-02-01 10:07:42 UTC 
Created onionshare tracking bugs for this issue:

Affects: fedora-all [bug 2048996]
Comment 2 Product Security DevOps Team 2022-02-01 11:01:04 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.