7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.082 Low
EPSS
Percentile
94.3%
Debian Security Advisory DSA-3629-1 [email protected]
https://www.debian.org/security/ Moritz Muehlenhoff
July 25, 2016 https://www.debian.org/security/faq
Package : ntp
CVE ID : CVE-2015-7974 CVE-2015-7977 CVE-2015-7978 CVE-2015-7979
CVE-2015-8138 CVE-2015-8158 CVE-2016-1547 CVE-2016-1548
CVE-2016-1550 CVE-2016-2516 CVE-2016-2518
Several vulnerabilities were discovered in the Network Time Protocol
daemon and utility programs:
CVE-2015-7974
Matt Street discovered that insufficient key validation allows
impersonation attacks between authenticated peers.
CVE-2015-7977 / CVE-2015-7978
Stephen Gray discovered that a NULL pointer dereference and a
buffer overflow in the handling of "ntpdc reslist" commands may
result in denial of service.
CVE-2015-7979
Aanchal Malhotra discovered that if NTP is configured for broadcast
mode, an attacker can send malformed authentication packets which
break associations with the server for other broadcast clients.
CVE-2015-8138
Matthew van Gundy and Jonathan Gardner discovered that missing
validation of origin timestamps in ntpd clients may result in denial
of service.
CVE-2015-8158
Jonathan Gardner discovered that missing input sanitising in ntpq
may result in denial of service.
CVE-2016-1547
Stephen Gray and Matthew van Gundy discovered that incorrect handling
of crypto NAK packets my result in denial of service.
CVE-2016-1548
Jonathan Gardner and Miroslav Lichvar discovered that ntpd clients
could be forced to change from basic client/server mode to interleaved
symmetric mode, preventing time synchronisation.
CVE-2016-1550
Matthew van Gundy, Stephen Gray and Loganaden Velvindron discovered
that timing leaks in the the packet authentication code could result
in recovery of a message digest.
CVE-2016-2516
Yihan Lian discovered that duplicate IPs on "unconfig" directives will
trigger an assert.
CVE-2016-2518
Yihan Lian discovered that an OOB memory access could potentially
crash ntpd.
For the stable distribution (jessie), these problems have been fixed in
version 1:4.2.6.p5+dfsg-7+deb8u2.
For the testing distribution (stretch), these problems have been fixed
in version 1:4.2.8p7+dfsg-1.
For the unstable distribution (sid), these problems have been fixed in
version 1:4.2.8p7+dfsg-1.
We recommend that you upgrade your ntp packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: [email protected]
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 7 | armel | ntpdate | < 1:4.2.6.p5+dfsg-2+deb7u7 | ntpdate_1:4.2.6.p5+dfsg-2+deb7u7_armel.deb |
Debian | 8 | s390x | ntp | < 1:4.2.6.p5+dfsg-7+deb8u2 | ntp_1:4.2.6.p5+dfsg-7+deb8u2_s390x.deb |
Debian | 7 | all | ntp | < 1:4.2.6.p5+dfsg-2+deb7u7 | ntp_1:4.2.6.p5+dfsg-2+deb7u7_all.deb |
Debian | 7 | all | ntp-doc | < 1:4.2.6.p5+dfsg-2+deb7u7 | ntp-doc_1:4.2.6.p5+dfsg-2+deb7u7_all.deb |
Debian | 7 | i386 | ntp | < 1:4.2.6.p5+dfsg-2+deb7u7 | ntp_1:4.2.6.p5+dfsg-2+deb7u7_i386.deb |
Debian | 8 | kfreebsd-amd64 | ntpdate | < 1:4.2.6.p5+dfsg-7+deb8u2 | ntpdate_1:4.2.6.p5+dfsg-7+deb8u2_kfreebsd-amd64.deb |
Debian | 8 | s390x | ntpdate | < 1:4.2.6.p5+dfsg-7+deb8u2 | ntpdate_1:4.2.6.p5+dfsg-7+deb8u2_s390x.deb |
Debian | 8 | armhf | ntpdate | < 1:4.2.6.p5+dfsg-7+deb8u2 | ntpdate_1:4.2.6.p5+dfsg-7+deb8u2_armhf.deb |
Debian | 8 | kfreebsd-amd64 | ntp | < 1:4.2.6.p5+dfsg-7+deb8u2 | ntp_1:4.2.6.p5+dfsg-7+deb8u2_kfreebsd-amd64.deb |
Debian | 8 | arm64 | ntpdate | < 1:4.2.6.p5+dfsg-7+deb8u2 | ntpdate_1:4.2.6.p5+dfsg-7+deb8u2_arm64.deb |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.082 Low
EPSS
Percentile
94.3%