2004461 – (CVE-2021-3751) CVE-2021-3751 libmobi: writes user controlled values out of the buffer which could result in RCE

Bug 2004461 (CVE-2021-3751) - CVE-2021-3751 libmobi: writes user controlled values out of the buffer which could result in RCE

Summary: CVE-2021-3751 libmobi: writes user controlled values out of the buffer which ...

Keywords:
Status:	CLOSED UPSTREAM
Alias:	CVE-2021-3751
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	high
Severity:	high
Target Milestone:	---
Assignee:	Red Hat Product Security
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:	2004462
Blocks:
TreeView+	depends on / blocked

Reported:	2021-09-15 11:18 UTC by Michael Kaplan
Modified:	2021-09-15 12:21 UTC (History)
CC List:	1 user (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:	2021-09-15 12:21:15 UTC
Embargoed:

Attachments	(Terms of Use)

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.

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