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Last updated: 10/25/2014 3:43:07 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-0021

Original release date: 01/07/2009
Last revised: 10/30/2012
Source: US-CERT/NIST

Overview

NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.

Description

Note that versions 4.2.5 before 4.2.5p150 are development versions and not production versions. Development versions are not included in the CPE configuration for CVEs.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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External Source: REDHAT
Name: RHSA-2009:0046
External Source: SLACKWARE
Name: SSA:2009-014-03
External Source: VUPEN
Name: ADV-2009-1297
Type: Advisory
External Source: APPLE
Name: APPLE-SA-2009-05-12
External Source: OVAL
Name: oval:org.mitre.oval:def:10035
External Source: MLIST
Name: [announce] 20090108 NTP 4.2.4p6 Released
External Source: SECTRACK
Name: 1021533
External Source: SECUNIA
Name: 34642
Type: Advisory
External Source: CONFIRM
Name: http://support.apple.com/kb/HT3549
External Source: VUPEN
Name: ADV-2009-0042
Type: Advisory
External Source: SECUNIA
Name: 35074
Type: Advisory
External Source: SUSE
Name: SUSE-SR:2009:008
External Source: SECUNIA
Name: 33648
Type: Advisory
External Source: BUGTRAQ
Name: 20090107 [oCERT-2008-016] Multiple OpenSSL signature verification API misuses
External Source: SUSE
Name: SUSE-SR:2009:005
External Source: MISC
Name: http://www.ocert.org/advisories/ocert-2008-016.html
US-CERT Vulnerability Note: CERT
Name: TA09-133A
External Source: SECUNIA
Name: 33558
Type: Advisory
External Source: SECUNIA
Name: 33406
Type: Advisory

References to Check Content

Identifier: oval:org.mitre.oval:def:10035
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Technical Details

Vulnerability Type (View All)