6.7 Medium
AI Score
Confidence
Low
4.3 Medium
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:N/I:P/A:P
0.011 Low
EPSS
Percentile
83.9%
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.
CPE | Name | Operator | Version |
---|---|---|---|
ntp | eq | <= 4.2.7p444 |
bugs.ntp.org/show_bug.cgi?id=2781
listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html
lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
lists.opensuse.org/opensuse-updates/2015-04/msg00052.html
rhn.redhat.com/errata/RHSA-2015-1459.html
support.apple.com/kb/HT204942
support.ntp.org/bin/view/Main/SecurityNotice
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd
tools.cisco.com/security/center/viewAlert.x?alertId=38275
www.debian.org/security/2015/dsa-3222
www.debian.org/security/2015/dsa-3223
www.kb.cert.org/vuls/id/374268
www.mandriva.com/security/advisories?name=MDVSA-2015:202
www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
www.securityfocus.com/bid/73950
www.securitytracker.com/id/1032031
www.ubuntu.com/usn/USN-2567-1
kc.mcafee.com/corporate/index?page=content&id=SB10114
lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html
marc.info/?l=bugtraq&m=143213867103400&w=2
marc.info/?l=bugtraq&m=145750740530849&w=2
security.gentoo.org/glsa/201509-01