CVE-2009-0021 · threatengine.sh

Home/CVE/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_Verify

CVE

CVE-2009-0021

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_Verify

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.

MEDIUM · CVSS 5 EPSS 0.02216

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules0 YARA rules0

⬡

Weakness Classification

CWE-287Improper Authentication

▤

Affected Products & Versions

2

ntp<= 4.2.4p4

ntpall versions

▣

Scoring & Timeline

5

MEDIUM · CVSS v2 (legacy) · secalert@redhat.com

View on NVD

This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.

v2 Vector

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

Published to NVD07 Jan 2009 · 05:30 PM

⚑

Vendor Advisories

2

rhsaRHSA-2009:0046Moderate

🔗

References & Sources

19

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://lists.apple.com/archives/security-announce/2009/May/msg00002.html

http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html

http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html

http://secunia.com/advisories/33406Vendor Advisory

http://secunia.com/advisories/33558Vendor Advisory

http://secunia.com/advisories/33648Vendor Advisory

Show all 19 references

http://secunia.com/advisories/34642Vendor Advisory

http://secunia.com/advisories/35074Vendor Advisory

http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177

http://support.apple.com/kb/HT3549

http://www.ocert.org/advisories/ocert-2008-016.html

http://www.redhat.com/support/errata/RHSA-2009-0046.html

http://www.securityfocus.com/archive/1/499827/100/0/threaded

http://www.securitytracker.com/id?1021533

http://www.us-cert.gov/cas/techalerts/TA09-133A.htmlUS Government Resource

http://www.vupen.com/english/advisories/2009/0042Vendor Advisory

http://www.vupen.com/english/advisories/2009/1297Vendor Advisory

https://lists.ntp.org/pipermail/announce/2009-January/000055.html

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035

Intelligence Graph · click any node to traverse

CVETechnique ActorTool Family

drag to reposition · click any node to traverse · button top-right enlarges

External lookups - second-class, for what we don’t hold ourselves

NVD CVE.org CISA Vulners Exploit-DB GitHub PoC VulnCheck KEV GreyNoise

Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities

Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs

Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures

Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1

About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service

threatengine.sh · Open-source threat intelligence platform · 100+ authoritative sources · Every fact traces to its origin