CVE-2014-9294: Weak RNG
First published: Fri Dec 19 2014(Updated: )
As per upstream NTP security advisory: Prior to ntp-4.2.7p230 ntp-keygen used a weak seed to prepare a random number generator that was of good quality back in the late 1990s. The random numbers produced was then used to generate symmetric keys. In ntp-4.2.8 we use a current-technology cryptographic random number generator, either RAND_bytes from OpenSSL, or arc4random(). Mitigation: Upgrade to 4.2.7p230 or later. This vulnerability was discovered in ntp-4.2.6 by Stephen Roettger of the Google Security Team.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/ntp | <4.2.8 | 4.2.8 |
| NTP ntp | <=4.2.7 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1176035#c0
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=5493dc3dofY6drKJde9W-5O1M3s4eg
- http://bk1.ntp.org/ntp-dev/util/ntp-keygen.c?PAGE=diffs&REV=4eae1b72298KRoBQmX-y8URCiRPH5g
- http://bugs.ntp.org/show_bug.cgi?id=2666
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=548db6ddlELn4rnqUZ4kKGOjvtXwbQ
- https://access.redhat.com/articles/1305723
- http://support.ntp.org/bin/view/Main/SecurityNotice#non_cryptographic_random_number
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1176191
- https://rhn.redhat.com/errata/RHSA-2014-2025.html
- https://rhn.redhat.com/errata/RHSA-2014-2024.html
- https://rhn.redhat.com/errata/RHSA-2015-0104.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1176035
- http://advisories.mageia.org/MGASA-2014-0541.html
- http://marc.info/?l=bugtraq&m=142469153211996&w=2
- http://marc.info/?l=bugtraq&m=142590659431171&w=2
- http://marc.info/?l=bugtraq&m=142853370924302&w=2
- http://marc.info/?l=bugtraq&m=144182594518755&w=2
- http://rhn.redhat.com/errata/RHSA-2014-2025.html
- http://rhn.redhat.com/errata/RHSA-2015-0104.html
- http://secunia.com/advisories/62209
- http://support.ntp.org/bin/view/Main/SecurityNotice
- http://www.kb.cert.org/vuls/id/852879
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:003
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.securityfocus.com/bid/71762
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04916783
- https://kc.mcafee.com/corporate/index?page=content&id=SB10103
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141222-ntpd
- https://www.arista.com/en/support/advisories-notices/security-advisories/1047-security-advisory-8
Frequently Asked Questions
What is the severity of CVE-2014-9294?
CVE-2014-9294 is considered to have a moderate severity level due to its impact on cryptographic key generation.
How do I fix CVE-2014-9294?
To fix CVE-2014-9294, update the NTP software to version 4.2.8 or later.
What software is affected by CVE-2014-9294?
CVE-2014-9294 affects NTP versions prior to 4.2.8.
What is the risk of using NTP versions prior to 4.2.8 in relation to CVE-2014-9294?
Using NTP versions prior to 4.2.8 poses a risk of compromising security due to the use of weak random number generation for cryptographic keys.
Can I continue to use older versions of NTP if I apply other security measures for CVE-2014-9294?
It is not recommended to continue using older versions of NTP even with additional security measures due to inherent vulnerabilities like CVE-2014-9294.
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