CVE-2014-9293
First published: Fri Dec 19 2014(Updated: )
As per upstream NTP security advisory: If no 'auth' key is set in the configuration file, ntpd would generate a random key on the fly. There were two problems with this: 1) the generated key was 31 bits in size, and 2) it used the (now weak) ntp_random() function, which was seeded with a 32-bit value and could only provide 32 bits of entropy. This was sufficient back in the late 1990s when the code was written. Not today. Mitigation: Upgrade to 4.2.7p11 or later. This vulnerability was noticed in ntp-4.2.6 by Neel Mehta of the Google Security Team.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NTP ntp | <=4.2.7 | |
| redhat/ntp | <4.2.8 | 4.2.8 |
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Reference Links
- http://advisories.mageia.org/MGASA-2014-0541.html
- http://bk1.ntp.org/ntp-dev/ntpd/ntp_config.c?PAGE=diffs&REV=4b6089c5KXhXqZqocF0DMXnQQsjOuw
- http://bugs.ntp.org/show_bug.cgi?id=2665
- 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/71757
- https://bugzilla.redhat.com/show_bug.cgi?id=1176032
- 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
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1176032#c0
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=5493dc3dofY6drKJde9W-5O1M3s4eg
- https://access.redhat.com/articles/1305723
- http://support.ntp.org/bin/view/Main/SecurityNotice#Weak_default_key_in_config_auth
- 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://access.redhat.com/security/cve/CVE-2014-9295
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1176037
- http://googleprojectzero.blogspot.com/2015/01/finding-and-exploiting-ntpd.html
- https://rhn.redhat.com/errata/RHSA-2015-0104.html
Frequently Asked Questions
What is the severity of CVE-2014-9293?
The severity of CVE-2014-9293 has been categorized as high due to the potential for attackers to exploit weak random keys.
How do I fix CVE-2014-9293?
To fix CVE-2014-9293, upgrade your NTP software to version 4.2.8 or later.
What systems are affected by CVE-2014-9293?
CVE-2014-9293 affects NTP versions up to 4.2.7 across various platforms.
What is the risk if CVE-2014-9293 is not addressed?
If CVE-2014-9293 is not addressed, unauthorized users may have an increased risk of intercepting and spoofing NTP traffic.
What is the cause of CVE-2014-9293?
CVE-2014-9293 is caused by NTP's weak random key generation when no authentication keys are configured.
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