Bug 1306184 (CVE-2015-7511)

Summary:	CVE-2015-7511 libgcrypt: side-channel attack on ECDH with Weierstrass curves
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	carnil, dkholia, erik-fedora, rdieter, rjones, sardella, slawomir, tmraz
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libgcrypt 1.6.5	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-06-08 05:57:02 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:	1306185, 1306186, 1306187
Bug Blocks:	1306188

Description Andrej Nemec 2016-02-10 09:12:30 UTC

A vulnerability was found in a way the ECDH encryption algorithm decrypts data. An attacker with a specialised setup can extract the secret decryption key from a target located in an adjacent room within seconds. This is done by measuring the target's electromagnetic emanations.

External reference:

http://www.cs.tau.ac.il/~tromer/ecdh/

Upstream announcement:

https://lists.gnupg.org/pipermail/gnupg-announce/2016q1/000384.html

Comment 1 Andrej Nemec 2016-02-10 09:13:13 UTC

Created libgcrypt tracking bugs for this issue:

Affects: fedora-all [bug 1306185]

Comment 2 Andrej Nemec 2016-02-10 09:13:19 UTC

Created mingw-libgcrypt tracking bugs for this issue:

Affects: fedora-all [bug 1306186]
Affects: epel-7 [bug 1306187]

Comment 3 Andrej Nemec 2016-02-10 09:18:58 UTC

Upstream bug fix:

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=88e1358962e902ff1cbec8d53ba3eee46407851a

Note:

The preferred way to protect against this vulnerability is to update to the new package version.

Comment 6 Fedora Update System 2016-07-22 18:21:06 UTC

libgcrypt-1.6.5-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2016-08-05 20:50:31 UTC

libgcrypt-1.6.5-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.