CVEvulnerability
CVE-2009-0021
5.0 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2009-01-07
- Last modified
- 2026-06-16
- Assigner
- [email protected]
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
- Weaknesses
- CWE-287
Description
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.
Affected configurations
• ntp ntp (<= 4.2.4p4)
• ntp ntp 4.2.0
• ntp ntp 4.2.2
• ntp ntp 4.2.4p1
• ntp ntp 4.2.4p2
• ntp ntp 4.2.4p3
Related
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- http://lists.apple.com/archives/security-announce/2009/May/msg00002.html lists.apple.com
- http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html lists.opensuse.org
- http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html lists.opensuse.org
- http://secunia.com/advisories/33406 Vendor Advisory
- http://secunia.com/advisories/33558 Vendor Advisory
- http://secunia.com/advisories/33648 Vendor Advisory
- http://secunia.com/advisories/34642 Vendor Advisory
- http://secunia.com/advisories/35074 Vendor Advisory
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177 slackware.com
- http://support.apple.com/kb/HT3549 support.apple.com
- http://www.ocert.org/advisories/ocert-2008-016.html www.ocert.org
- http://www.redhat.com/support/errata/RHSA-2009-0046.html www.redhat.com
- http://www.securityfocus.com/archive/1/499827/100/0/threaded www.securityfocus.com
- http://www.securitytracker.com/id?1021533 www.securitytracker.com
- http://www.us-cert.gov/cas/techalerts/TA09-133A.html US Government Resource
- http://www.vupen.com/english/advisories/2009/0042 Vendor Advisory
- http://www.vupen.com/english/advisories/2009/1297 Vendor Advisory
- https://lists.ntp.org/pipermail/announce/2009-January/000055.html lists.ntp.org
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035 oval.cisecurity.org
- http://lists.apple.com/archives/security-announce/2009/May/msg00002.html lists.apple.com
- http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html lists.opensuse.org
- http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html lists.opensuse.org
- http://secunia.com/advisories/33406 Vendor Advisory
- http://secunia.com/advisories/33558 Vendor Advisory
- http://secunia.com/advisories/33648 Vendor Advisory
- http://secunia.com/advisories/34642 Vendor Advisory
- http://secunia.com/advisories/35074 Vendor Advisory
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177 slackware.com
- http://support.apple.com/kb/HT3549 support.apple.com
- http://www.ocert.org/advisories/ocert-2008-016.html www.ocert.org
- http://www.redhat.com/support/errata/RHSA-2009-0046.html www.redhat.com
- http://www.securityfocus.com/archive/1/499827/100/0/threaded www.securityfocus.com
- http://www.securitytracker.com/id?1021533 www.securitytracker.com
- http://www.us-cert.gov/cas/techalerts/TA09-133A.html US Government Resource
- http://www.vupen.com/english/advisories/2009/0042 Vendor Advisory
- http://www.vupen.com/english/advisories/2009/1297 Vendor Advisory
- https://lists.ntp.org/pipermail/announce/2009-January/000055.html lists.ntp.org
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035 oval.cisecurity.org