Bug 2004461 (CVE-2021-3751)

Summary:	CVE-2021-3751 libmobi: writes user controlled values out of the buffer which could result in RCE
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	sergey.avseyev
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2021-09-15 12:21:15 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2004462
Bug Blocks:

Description Michael Kaplan 2021-09-15 11:18:05 UTC

This vulnerability is of writing user controlled values out of the buffer. The buffer is of MOBIBuffer type which is allocated using malloc. It is possible for the attacker to finally accomplish RCE (Remote Code Execution) using this out-of-bound write vulnerability to overwrite control-flow critical memory values.

References: 

https://huntr.dev/bounties/fcb4383c-bc27-4b89-bfce-6b041f0cb769
https://github.com/bfabiszewski/libmobi/commit/ab5bf0e37e540eac682a14e628853b918626e72b

Comment 1 Michael Kaplan 2021-09-15 11:18:22 UTC

Created libmobi tracking bugs for this issue:

Affects: fedora-all [bug 2004462]

Comment 2 Product Security DevOps Team 2021-09-15 12:21:15 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.