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…
Does this matter?
Lower severity and a low EPSS score (3.22%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
- EPSS
- 3.22% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- ntp/ntp
- Source
- secalert@redhat.com
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/33406Vendor Advisory
- http://secunia.com/advisories/33558Vendor Advisory
- http://secunia.com/advisories/33648Vendor Advisory
- http://secunia.com/advisories/34642Vendor Advisory
- http://secunia.com/advisories/35074Vendor Advisory
- 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.htmlUS Government Resource
- http://www.vupen.com/english/advisories/2009/0042Vendor Advisory
- http://www.vupen.com/english/advisories/2009/1297Vendor Advisory
- 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/33406Vendor Advisory
- http://secunia.com/advisories/33558Vendor Advisory
- http://secunia.com/advisories/33648Vendor Advisory
- http://secunia.com/advisories/34642Vendor Advisory
- http://secunia.com/advisories/35074Vendor Advisory
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.