Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
[ GLSA 201001-01 ] NTP: Denial of Service
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index News & Announcements
View previous topic :: View next topic  
Author Message
GLSA
Veteran
Veteran


Joined: 12 May 2004
Posts: 1471

PostPosted: Sun Jan 03, 2010 12:26 am    Post subject: [ GLSA 201001-01 ] NTP: Denial of Service Reply with quote

Gentoo Linux Security Advisory

Title: NTP: Denial of Service (GLSA 201001-01)
Severity: normal
Exploitable: remote
Date: January 03, 2010
Bug(s): #290881
ID: 201001-01

Synopsis


A Denial of Service condition in ntpd can cause excessive CPU or bandwidth
consumption.


Background


NTP is a set of the Network Time Protocol programs.


Affected Packages

Package: net-misc/ntp
Vulnerable: < 4.2.4_p7-r1
Unaffected: >= 4.2.4_p7-r1
Architectures: All supported architectures


Description


Robin Park and Dmitri Vinokurov discovered that ntp_request.c in ntpd
does not handle MODE_PRIVATE packets correctly, causing a continuous
exchange of MODE_PRIVATE error responses between two NTP daemons or
causing high CPU load on a single host.


Impact


A remote, unauthenticated attacker could send a specially crafted
MODE_PRIVATE packet, allowing for a Denial of Service condition (CPU
and bandwidth consumption).


Workaround


There is no known workaround at this time.


Resolution


All NTP users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.4_p7-r1"


References

CVE-2009-3563
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index News & Announcements All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum