Bug 2016493 (CVE-2021-3889)

Summary:	CVE-2021-3889 libmobi: out-of-bounds read due to incomplete check in mobi_decompress_huffman_internal() in src/compression.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	fedora, sergey.avseyev
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 20:08:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2016494
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-10-21 17:56:47 UTC

libmobi is vulnerable to use of out-of-range pointer offset.

Reference:
https://huntr.dev/bounties/efb3e261-3f7d-4a45-8114-e0ace6b21516

Upstream patch:
https://github.com/bfabiszewski/libmobi/commit/bec783e6212439a335ba6e8df7ab8ed610ca9a21

Comment 1 Guilherme de Almeida Suckevicz 2021-10-21 17:57:00 UTC

Created libmobi tracking bugs for this issue:

Affects: fedora-all [bug 2016494]

Comment 2 Product Security DevOps Team 2021-10-21 20:08:27 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.