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Sicherheit: Mehrere Probleme in NTP
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in NTP
ID: FEDORA-2015-5830
Distribution: Fedora
Plattformen: Fedora 21
Datum: Di, 28. April 2015, 16:34
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1798
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1799
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3405

Originalnachricht

Name        : ntp
Product : Fedora 21
Version : 4.2.6p5
Release : 30.fc21
URL : http://www.ntp.org
Summary : The NTP daemon and utilities
Description :
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,
ntpdate is in the ntpdate package and sntp is in the sntp package.
The documentation is in the ntp-doc package.

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Update Information:

Security fix for CVE-2015-1799, CVE-2015-1798, #1210324
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ChangeLog:

* Tue Apr 14 2015 Miroslav Lichvar <mlichvar@redhat.com> 4.2.6p5-30
- fix generation of MD5 keys with ntp-keygen on big-endian systems (#1210324)
* Wed Apr 8 2015 Miroslav Lichvar <mlichvar@redhat.com> 4.2.6p5-29
- reject packets without MAC when authentication is enabled (CVE-2015-1798)
- protect symmetric associations with symmetric key against DoS attack
(CVE-2015-1799)
* Thu Feb 26 2015 Miroslav Lichvar <mlichvar@redhat.com> 4.2.6p5-28
- don't step clock for leap second with -x option (#1196635)
- allow creating all SHM segments with owner-only access
- allow symmetric keys up to 32 bytes again
- use larger RSA exponent in ntp-keygen
- fix crash in ntpq mreadvar command
- don't drop packets with source port below 123
- increase memlock limit again
- fix typos in ntpd man page
- improve documentation of restrict command
* Thu Feb 5 2015 Miroslav Lichvar <mlichvar@redhat.com> 4.2.6p5-27
- validate lengths of values in extension fields (CVE-2014-9297)
- drop packets with spoofed source address ::1 (CVE-2014-9298)
* Thu Jan 29 2015 Miroslav Lichvar <mlichvar@redhat.com> 4.2.6p5-26
- require timedatex (#1136905)
* Fri Dec 19 2014 Miroslav Lichvar <mlichvar@redhat.com> 4.2.6p5-25
- don't generate weak control key for resolver (CVE-2014-9293)
- don't generate weak MD5 keys in ntp-keygen (CVE-2014-9294)
- fix buffer overflows via specially-crafted packets (CVE-2014-9295)
- don't mobilize passive association when authentication fails
(CVE-2014-9296)
* Tue Nov 4 2014 Miroslav Lichvar <mlichvar@redhat.com> 4.2.6p5-24
- use network-online target in ntpdate and sntp services (#1116474)
- move sntp kod database to allow SELinux labeling
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References:

[ 1 ] Bug #1199435 - CVE-2015-1799 ntp: authentication doesn't protect
symmetric associations against DoS attacks
https://bugzilla.redhat.com/show_bug.cgi?id=1199435
[ 2 ] Bug #1199430 - CVE-2015-1798 ntp: ntpd accepts unauthenticated packets
with symmetric key crypto
https://bugzilla.redhat.com/show_bug.cgi?id=1199430
[ 3 ] Bug #1210324 - CVE-2015-3405 ntp: ntp-keygen may generate non-random
symmetric keys on big-endian systems
https://bugzilla.redhat.com/show_bug.cgi?id=1210324
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This update can be installed with the "yum" update program. Use
su -c 'yum update ntp' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

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/keys
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