Vulnerability Monitor

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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.

Published

2009-01-07T17:30:00.360

Last Modified

2025-04-09T00:30:58.490

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-287

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	ntp	ntp	≤ 4.2.4p4	Yes
Application	ntp	ntp	4.2.0	Yes
Application	ntp	ntp	4.2.2	Yes
Application	ntp	ntp	4.2.4p1	Yes
Application	ntp	ntp	4.2.4p2	Yes
Application	ntp	ntp	4.2.4p3	Yes

References

http://lists.apple.com/archives/security-announce/2009/May/msg00002.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html ([email protected])
http://secunia.com/advisories/33406 Vendor Advisory ([email protected])
http://secunia.com/advisories/33558 Vendor Advisory ([email protected])
http://secunia.com/advisories/33648 Vendor Advisory ([email protected])
http://secunia.com/advisories/34642 Vendor Advisory ([email protected])
http://secunia.com/advisories/35074 Vendor Advisory ([email protected])
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177 ([email protected])
http://support.apple.com/kb/HT3549 ([email protected])
http://www.ocert.org/advisories/ocert-2008-016.html ([email protected])
http://www.redhat.com/support/errata/RHSA-2009-0046.html ([email protected])
http://www.securityfocus.com/archive/1/499827/100/0/threaded ([email protected])
http://www.securitytracker.com/id?1021533 ([email protected])
http://www.us-cert.gov/cas/techalerts/TA09-133A.html US Government Resource ([email protected])
http://www.vupen.com/english/advisories/2009/0042 Vendor Advisory ([email protected])
http://www.vupen.com/english/advisories/2009/1297 Vendor Advisory ([email protected])
https://lists.ntp.org/pipermail/announce/2009-January/000055.html ([email protected])
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035 ([email protected])
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/33406 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/33558 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/33648 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/34642 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/35074 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177 (af854a3a-2127-422b-91ae-364da2661108)
http://support.apple.com/kb/HT3549 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ocert.org/advisories/ocert-2008-016.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2009-0046.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/499827/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id?1021533 (af854a3a-2127-422b-91ae-364da2661108)
http://www.us-cert.gov/cas/techalerts/TA09-133A.html US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2009/0042 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2009/1297 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.ntp.org/pipermail/announce/2009-January/000055.html (af854a3a-2127-422b-91ae-364da2661108)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035 (af854a3a-2127-422b-91ae-364da2661108)