NTP Daemon up to 4.2.7 Random Generator weak prng

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CTI Interest Score
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6.6$0-$5k0.00

A vulnerability, which was classified as critical, was found in NTP Daemon up to 4.2.7 (Network Management Software). This affects an unknown code of the component Random Generator. The manipulation with an unknown input leads to a weak prng vulnerability. CWE is classifying the issue as CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

util/ntp-keygen.c in ntp-keygen in NTP before 4.2.7p230 uses a weak RNG seed, which makes it easier for remote attackers to defeat cryptographic protection mechanisms via a brute-force attack.

The weakness was disclosed 11/03/2014 by Stephen Roettger with Google Security Team as Sec 2666 as confirmed blog post (Bug Tracker). The advisory is shared at bugs.ntp.org. This vulnerability is uniquely identified as CVE-2014-9294 since 12/05/2014. The exploitability is told to be easy. It is possible to initiate the attack remotely. A authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 81271 (AIX 6.1 TL 8 : ntp (IV68426)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185097 (HP-UX Running NTP Multiple Vulnerabilities (HPSBUX03240)).

Upgrading to version 4.2.7p230 eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting restrict ... noquery. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (99577) and Tenable (81271). The entries 68452, 68453, 68454 and 68455 are pretty similar.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.6
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Weak prng
CWE: CWE-338 / CWE-331 / CWE-330
ATT&CK: T1600.001

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 81271
Nessus Name: AIX 6.1 TL 8 : ntp (IV68426)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703108
OpenVAS Name: Debian Security Advisory DSA 3108-1 (ntp - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NTP Daemon 4.2.7p230
Config: restrict ... noquery

Timelineinfo

11/01/2011 🔍
11/03/2014 +1098 days 🔍
11/03/2014 +0 days 🔍
12/05/2014 +32 days 🔍
12/19/2014 +14 days 🔍
12/19/2014 +0 days 🔍
12/19/2014 +0 days 🔍
12/20/2014 +1 days 🔍
12/22/2014 +2 days 🔍
01/07/2015 +16 days 🔍
01/13/2015 +6 days 🔍
03/01/2022 +2604 days 🔍

Sourcesinfo

Advisory: Sec 2666
Researcher: Stephen Roettger
Organization: Google Security Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-9294 (🔍)
OVAL: 🔍

CERT VU: 🔍
X-Force: 99577 - NTP ntp-keygen.c weak security, Medium Risk
SecurityTracker: 1031411 - NTP Uses Weak Default Encryption Key and Weak RNG Seed
Vulnerability Center: 47961 - NTP 4.x before 4.2.7p230 Remote Security Restrictions Bypass due to Weak RNG Seed, High
SecurityFocus: 71762 - NTP 'ntp-keygen.c' Predictable Random Number Generator Weakness
Secunia: 62209 - Cisco ACNS (Application and Content Networking System) NTP Multiple Buffer Overflow Vulner, Highly Critical

See also: 🔍

Entryinfo

Created: 12/22/2014 08:36
Updated: 03/01/2022 14:17
Changes: 12/22/2014 08:36 (93), 06/17/2017 07:41 (3), 03/01/2022 14:17 (3)
Complete: 🔍

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