Bug 2025034 (CVE-2021-41229)

Summary:	CVE-2021-41229 bluez: memory leak in the SDP protocol
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	bdettelb, bnocera, darcari, dwmw2, dzickus, gtiwari, hwkernel-mgr, spacewar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-11 19:16:18 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:	2025035, 2027434, 2027435
Bug Blocks:	2025036

Description Guilherme de Almeida Suckevicz 2021-11-19 18:27:47 UTC

BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.

Reference:
https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq

Comment 1 Guilherme de Almeida Suckevicz 2021-11-19 18:28:02 UTC

Created bluez tracking bugs for this issue:

Affects: fedora-all [bug 2025035]

Comment 2 Garrett Tucker 2021-11-29 16:20:45 UTC

All versions of RHEL are affected by this flaw. This is low in impact however so flaw remediation will be delegated for supported releases. The flaw was caused by unfreed memory of a linked list which led to a memory leak. This could become very large which could result in the service crashing due to this flaw. A patch has been applied by ubuntu for all bluez packages and link provided below: 

Patch: https://git.launchpad.net/ubuntu/+source/bluez/diff/debian/patches/CVE-2021-41229.patch?h=applied/ubuntu/hirsute-security

Comment 4 errata-xmlrpc 2022-05-10 15:17:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:2081 https://access.redhat.com/errata/RHSA-2022:2081

Comment 5 Product Security DevOps Team 2022-05-11 19:16:16 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-41229