Bug 1443602 (CVE-2017-2784)

Summary:	CVE-2017-2784 mbedtls: ARM Mbedtls x509 ECDSA invalid public key use-after-free
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	ms, redhat-bugzilla
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2017-04-19 14:38:31 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1443603, 1443604
Bug Blocks:

Description Andrej Nemec 2017-04-19 14:23:22 UTC

An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbedTLS 2.4.0. A specially crafted x509 certificate, when parsed by mbedTLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.

External References:

http://www.talosintelligence.com/reports/TALOS-2017-0274/

Comment 1 Andrej Nemec 2017-04-19 14:23:53 UTC

Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 1443604]
Affects: fedora-all [bug 1443603]