CVE-2009-0021 : Detail

CVE-2009-0021

Authorization problems
A07-Identif. and Authent. Fail
2.92%V3
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 [email protected]

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