CVE-2009-0021

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Summary

CVECVE-2009-0021
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2009-01-07 17:30:00 UTC
Updated2026-04-23 00:35:47 UTC
DescriptionNTP 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.

Risk And Classification

Primary CVSS: v2.0 5 from [email protected]

AV:N/AC:L/Au:N/C:P/I:N/A:N

Problem Types: CWE-287 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:L/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ntp Ntp 4.2.0 All All All
Application Ntp Ntp 4.2.2 All All All
Application Ntp Ntp 4.2.4p1 All All All
Application Ntp Ntp 4.2.4p2 All All All
Application Ntp Ntp 4.2.4p3 All All All
Application Ntp Ntp All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Slackware update for ntp - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
Support af854a3a-2127-422b-91ae-364da2661108 www.redhat.com
[security-announce] SUSE Security Summary Report: SUSE-SR:2009:005 af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
APPLE-SA-2009-05-12 Security Update 2009-002 / Mac OS X v10.5.7 af854a3a-2127-422b-91ae-364da2661108 lists.apple.com
About the security content of Security Update 2009-002 / Mac OS X v10.5.7 af854a3a-2127-422b-91ae-364da2661108 support.apple.com
oCERT.org - oCERT Advisories af854a3a-2127-422b-91ae-364da2661108 www.ocert.org
Webmail : Solution de messagerie professionnelle - OVHcloud- OVH af854a3a-2127-422b-91ae-364da2661108 www.vupen.com Vendor Advisory
Apple Mac OS X Security Update Fixes Multiple Vulnerabilities - Secunia Advisories - Vulnerability Information - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
The Slackware Linux Project: Slackware Security Advisories af854a3a-2127-422b-91ae-364da2661108 slackware.com
Red Hat update for ntp - Secunia Advisories - Vulnerability Intelligence - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
Webmail- OVH af854a3a-2127-422b-91ae-364da2661108 www.vupen.com Vendor Advisory
NTP Signature Validation Flaw Lets Remote Users Bypass Validation Checks - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
SUSE Update for Multiple Packages - Secunia Advisories - Vulnerability Information - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
[ntp:announce] NTP 4.2.4p6 Released af854a3a-2127-422b-91ae-364da2661108 lists.ntp.org
[security-announce] SUSE Security Summary Report: SUSE-SR:2009:008 af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
NTP OpenSSL "EVP_VerifyFinal()" Spoofing Vulnerability - Secunia Advisories - Vulnerability Information - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
Repository / Oval Repository af854a3a-2127-422b-91ae-364da2661108 oval.cisecurity.org
US-CERT Technical Cyber Security Alert TA09-133A -- Apple Updates for Multiple Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.us-cert.gov US Government Resource
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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