Bug 1909806 (CVE-2020-0499)

Summary:	CVE-2020-0499 flac: out-of-bounds read can lead to denial of service
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ajax, caillon+fedoraproject, gnome-sig, mclasen, mlichvar, rhughes, rstrode, valtri
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:	2021-11-02 18:23:59 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:	1909807, 1909808, 1910523, 1912625
Bug Blocks:	1909809

Description Guilherme de Almeida Suckevicz 2020-12-21 17:43:48 UTC

In FLAC__bitreader_read_rice_signed_block of bitreader.c, there is a possible out of bounds read due to a heap buffer overflow. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.

References:
https://source.android.com/security/bulletin/pixel/2020-12-01
https://android.googlesource.com/platform/external/flac/+/029048f823ced50f63a92e25073427ec3a9bd909

Upstream patch:
https://github.com/xiph/flac/commit/2e7931c27eb15e387da440a37f12437e35b22dd4

Comment 1 Guilherme de Almeida Suckevicz 2020-12-21 17:44:09 UTC

Created flac tracking bugs for this issue:

Affects: fedora-all [bug 1909807]


Created mingw-flac tracking bugs for this issue:

Affects: fedora-all [bug 1909808]

Comment 4 Todd Cullum 2021-01-05 02:09:29 UTC

Statement:

Red Hat Product Security has lowered the severity of this flaw to Low because while the initial report stated a threat of remote information disclosure, it does not appear to be a possibility in flac as shipped with Red Hat Enterprise Linux 8.