Vulnerability Details : 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_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.
Vulnerability category: BypassGain privilege
Exploit prediction scoring system (EPSS) score for CVE-2009-0021
Probability of exploitation activity in the next 30 days: 0.73%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 78 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2009-0021
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST |
CWE ids for CVE-2009-0021
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When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
References for CVE-2009-0021
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http://www.vupen.com/english/advisories/2009/0042
Vendor Advisory
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http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html
[security-announce] SUSE Security Summary Report: SUSE-SR:2009:005 - openSUSE Security Announce - openSUSE Mailing Lists
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http://www.vupen.com/english/advisories/2009/1297
Webmail: access your OVH emails on ovhcloud.com | OVHcloudVendor Advisory
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https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035
- http://www.securityfocus.com/archive/1/499827/100/0/threaded
- http://www.ocert.org/advisories/ocert-2008-016.html
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http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html
[security-announce] SUSE Security Summary Report: SUSE-SR:2009:008 - openSUSE Security Announce - openSUSE Mailing Lists
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http://www.securitytracker.com/id?1021533
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http://www.redhat.com/support/errata/RHSA-2009-0046.html
- http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
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http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177
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http://support.apple.com/kb/HT3549
About the security content of Security Update 2009-002 / Mac OS X v10.5.7 - Apple Support
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http://www.us-cert.gov/cas/techalerts/TA09-133A.html
Apple Updates for Multiple Vulnerabilities | CISAUS Government Resource
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https://lists.ntp.org/pipermail/announce/2009-January/000055.html
Products affected by CVE-2009-0021
- cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.4p1:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.4p3:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.4p2:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.0:*:*:*:*:*:*:*