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CVE-2009-0021

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Date: January 7, 2009

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.

Language: C

Severity Score

Related Resources (23)

http://www.ocert.org/advisories/ocert-2008-016.html
http://www.vupen.com/english/advisories/2009/0042
http://secunia.com/advisories/33558
http://www.securityfocus.com/archive/1/499827/100/0/threaded
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035
http://www.vupen.com/english/advisories/2009/1297
http://secunia.com/advisories/33648
http://secunia.com/advisories/33406
http://www.redhat.com/support/errata/RHSA-2009-0046.html
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
https://nvd.nist.gov/vuln/detail/CVE-2009-0021
https://people.canonical.com/~ubuntu-security/cve/CVE-2009-0021
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html
https://lists.ntp.org/pipermail/announce/2009-January/000055.html
http://secunia.com/advisories/34642
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html
https://access.redhat.com/security/cve/CVE-2009-0021
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177
http://secunia.com/advisories/35074
http://support.apple.com/kb/HT3549
http://www.us-cert.gov/cas/techalerts/TA09-133A.html
http://www.securitytracker.com/id?1021533
https://www.mend.io/vulnerability-database/CVE-2009-0021

Severity Score

Weakness Type (CWE)

Authentication Issues

CWE-287

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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