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Bug 1424992 - (CVE-2017-2626) CVE-2017-2626 libICE: weak entropy usage in session keys
CVE-2017-2626 libICE: weak entropy usage in session keys
Status: CLOSED WONTFIX
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170228,reported=2...
: Security
Depends On: 1427715 1431691
Blocks: 1424993
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Reported: 2017-02-20 04:34 EST by Martin Prpič
Modified: 2017-08-01 12:04 EDT (History)
4 users (show)

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Doc Text:
It was discovered that libICE used a weak entropy to generate keys. A local attacker could potentially use this flaw for session hijacking using the information available from the process list.
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Last Closed: 2017-02-28 19:37:11 EST
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1865 normal SHIPPED_LIVE Moderate: X.org X11 libraries security, bug fix and enhancement update 2017-08-01 13:50:43 EDT

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Description Martin Prpič 2017-02-20 04:34:20 EST 
It was found that libICE depends on a weak entropy mechanism, possibly allowing attackers to attach to the session of a different user.
Comment 1 Martin Prpič 2017-02-20 04:34:23 EST 
Acknowledgments:

Name: Eric Sesterhenn (X41 D-Sec GmbH)
Comment 2 Doran Moppert 2017-02-27 01:13:40 EST 
Adjusted CVSS scoring and reduced impact to Low based on requiring the attacker needing to be logged in locally, and ICE's only visible use in RHEL being XSMP session managers, whose disruption is of limited impact.
Comment 5 Doran Moppert 2017-02-28 19:17:30 EST 
Created libICE tracking bugs for this issue:

Affects: fedora-all [bug 1427715]
Comment 6 Eric Christensen 2017-07-26 09:56:36 EDT 
Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 8 errata-xmlrpc 2017-08-01 12:04:25 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1865 https://access.redhat.com/errata/RHSA-2017:1865
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