Bug 1391818 – CVE-2016-8635 nss: small-subgroups attack flaw

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Bug 1391818 - (CVE-2016-8635) CVE-2016-8635 nss: small-subgroups attack flaw

Summary:	CVE-2016-8635 nss: small-subgroups attack flaw

Status:	CLOSED ERRATA

Aliases:	CVE-2016-8635

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20161116,repor...
Keywords:	Security

Depends On:
Blocks:	1380228 1391819
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Reported:	2016-11-04 02:40 EDT by Huzaifa S. Sidhpurwala
Modified:	2016-12-06 21:13 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:	It was found that Diffie Hellman Client key exchange handling in NSS was vulnerable to small subgroup confinement attack. An attacker could use this flaw to recover private keys by confining the client DH key to small subgroup of the desired group.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-11-16 01:12:27 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:2779	normal	SHIPPED_LIVE	Moderate: nss and nss-util security update	2016-11-22 08:49:09 EST

Groups: None (edit)

Description Huzaifa S. Sidhpurwala 2016-11-04 02:40:23 EDT

It was found that Diffie Hellman Client key exchange handling in NSS, was vulnerable to small subgroup confinement attack[1]. An attacker could use this flaw to recover private keys by confining the client DH key to small subgroup of the desired group.


[1] https://en.wikipedia.org/wiki/Small_subgroup_confinement_attack

Comment 4 Huzaifa S. Sidhpurwala 2016-11-14 23:31:06 EST

Acknowledgments:

Name: Hubert Kario (Red Hat)

Comment 7 errata-xmlrpc 2016-11-16 00:59:43 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 5

Via RHSA-2016:2779 https://rhn.redhat.com/errata/RHSA-2016-2779.html

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