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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5 UNKNOWN
NETWORK
LOW
AV:N/AC:L/Au:N/C:P/I:N/A:N
redhatCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 88%
VendorProductVersion
ntpntp
𝑥
≤ 4.2.4p4
ntpntp
4.2.0
ntpntp
4.2.2
ntpntp
4.2.4p1:p1
ntpntp
4.2.4p2:p2
ntpntp
4.2.4p3:p3
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
ntp
bullseye
1:4.2.8p15+dfsg-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
ntp
intrepid
Fixed 1:4.2.4p4+dfsg-6ubuntu2.2
released
hardy
Fixed 1:4.2.4p4+dfsg-3ubuntu2.1
released
gutsy
Fixed 1:4.2.4p0+dfsg-1ubuntu2.1
released
dapper
Fixed 1:4.2.0a+stable-8.1ubuntu6.1
released
Common Weakness Enumeration
References
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/33406
http://secunia.com/advisories/33558
http://secunia.com/advisories/33648
http://secunia.com/advisories/34642
http://secunia.com/advisories/35074
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.html
http://www.vupen.com/english/advisories/2009/0042
http://www.vupen.com/english/advisories/2009/1297
https://lists.ntp.org/pipermail/announce/2009-January/000055.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035
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/33406
http://secunia.com/advisories/33558
http://secunia.com/advisories/33648
http://secunia.com/advisories/34642
http://secunia.com/advisories/35074
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.html
http://www.vupen.com/english/advisories/2009/0042
http://www.vupen.com/english/advisories/2009/1297
https://lists.ntp.org/pipermail/announce/2009-January/000055.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035