Fedora 34: 2023-0145 High: NTP Certificate Vulnerability Widespread

The Network Time Protocol (NTP) is used to synchronize a computer's

time with another reference time source. This package includes ntpd

(a daemon which continuously adjusts system time) and utilities used

to query and configure the ntpd daemon.

Perl scripts ntp-wait and ntptrace are in the ntp-perl package and

the ntpdate program is in the ntpdate package.

This update fixes 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.

* Mon Jan 12 2009 Miroslav Lichvar 4.2.4p6-1

- update to 4.2.4p6 (CVE-2009-0021)

[ 1 ] Bug #476807 - CVE-2009-0021 ntp incorrectly checks for malformed signatures

https://bugzilla.redhat.com/show_bug.cgi?id=476807

su -c 'yum update ntp' at the command line.

For more information, refer to "Managing Software with yum",

available at .

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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