Bug 1641465 (CVE-2017-5735)

Summary:	CVE-2017-5735 edk2: Privilege escalation via heap-based buffer overflow in Decode() function
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	berrange, kraxel, lersek, pbonzini, philmd, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	[REJECTED CVE] A heap-based buffer overflow issue was identified in EDK2 in the Decode() function of BaseUefiDecompressLib.c, TianoCompress.c and UEFI Specification. The issue arises from improper handling of data, which could allow an authenticated attacker to exploit it by supplying a crafted file. This could lead to privilege escalation.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-06 13:20:18 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:	1641467, 1641468, 1641469, 1666586
Bug Blocks:	1641438

Description Sam Fowler 2018-10-22 06:21:34 UTC

In EDK II, a vulnerability exists in BaseUefiDecompressLib.c, TianoCompress.c, and UEFI specification via a heap-based buffer overflow in the Decode() function. An authenticated attacker could exploit this via a crafted file to escalate privileges.


External Reference:

https://edk2-docs.gitbooks.io/security-advisory/content/edk-ii-tianocompress-bounds-checking-issues.html


Upstream Bug:

https://bugzilla.tianocore.org/show_bug.cgi?id=686

Comment 1 Sam Fowler 2018-10-22 06:22:50 UTC

Created edk2 tracking bugs for this issue:

Affects: epel-all [bug 1641468]
Affects: fedora-all [bug 1641467]

Comment 4 errata-xmlrpc 2019-08-06 12:18:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2125 https://access.redhat.com/errata/RHSA-2019:2125

Comment 5 Product Security DevOps Team 2019-08-06 13:20:18 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-2017-5735