CVE-2009-0021 : Detail

CVE-2009-0021

Authorization problems
A07-Identif. and Authent. Fail
2.22%V4
Network
2009-01-07
16h00 +00:00
2018-10-11
17h57 +00:00
CVE.org
NVD
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CVE Descriptions

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.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-287 Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Metrics

Metrics Score Severity CVSS Vector Source
V2 5 AV:N/AC:L/Au:N/C:P/I:N/A:N nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Products Mentioned

Configuraton 0

Ntp>>Ntp >> Version To (including) 4.2.4p4

Ntp>>Ntp >> Version 4.2.0

Ntp>>Ntp >> Version 4.2.2

Ntp>>Ntp >> Version 4.2.4p1

Ntp>>Ntp >> Version 4.2.4p2

Ntp>>Ntp >> Version 4.2.4p3

References

http://support.apple.com/kb/HT3549
Tags : x_refsource_CONFIRM
http://www.securitytracker.com/id?1021533
Tags : vdb-entry, x_refsource_SECTRACK
http://secunia.com/advisories/34642
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.redhat.com/support/errata/RHSA-2009-0046.html
Tags : vendor-advisory, x_refsource_REDHAT
http://secunia.com/advisories/35074
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/33558
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/33648
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/33406
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.us-cert.gov/cas/techalerts/TA09-133A.html
Tags : third-party-advisory, x_refsource_CERT
http://www.vupen.com/english/advisories/2009/1297
Tags : vdb-entry, x_refsource_VUPEN
http://www.vupen.com/english/advisories/2009/0042
Tags : vdb-entry, x_refsource_VUPEN
The information presented on CVE Find originates from several carefully selected reference sources. CVE data is provided by MITRE Corporation and the National Vulnerability Database (NVD). The Known Exploited Vulnerabilities (KEV) catalog is sourced from the Cybersecurity and Infrastructure Security Agency (CISA), while EPSS scores come from FIRST.org. Additionally, data regarding software weaknesses (CWE) and common attack patterns (CAPEC) is maintained by MITRE Corporation, and information on hardware and software configurations (CPE) is provided by the NVD.