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
0.008 Low
EPSS
Percentile
81.4%
Debian Security Advisory DSA-3223-1 [email protected]
http://www.debian.org/security/ Alessandro Ghedini
April 12, 2015 http://www.debian.org/security/faq
Package : ntp
CVE ID : CVE-2015-1798 CVE-2015-1799
Debian Bug : 782095
Multiple vulnerabilities were discovered in ntp, an implementation of the
Network Time Protocol:
CVE-2015-1798
When configured to use a symmetric key with an NTP peer, ntpd would
accept packets without MAC as if they had a valid MAC. This could
allow a remote attacker to bypass the packet authentication and send
malicious packets without having to know the symmetric key.
CVE-2015-1799
When peering with other NTP hosts using authenticated symmetric
association, ntpd would update its internal state variables before
the MAC of the NTP messages was validated. This could allow a remote
attacker to cause a denial of service by impeding synchronization
between NTP peers.
Additionally, it was discovered that generating MD5 keys using ntp-keygen
on big endian machines would either trigger an endless loop, or generate
non-random keys.
For the stable distribution (wheezy), these problems have been fixed in
version 1:4.2.6.p5+dfsg-2+deb7u4.
For the unstable distribution (sid), these problems have been fixed in
version 1:4.2.6.p5+dfsg-7.
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 | 6 | i386 | ntpdate | < 1:4.2.6.p2+dfsg-1+deb6u3 | ntpdate_1:4.2.6.p2+dfsg-1+deb6u3_i386.deb |
Debian | 7 | mips | ntpdate | < 1:4.2.6.p5+dfsg-2+deb7u4 | ntpdate_1:4.2.6.p5+dfsg-2+deb7u4_mips.deb |
Debian | 6 | i386 | ntp | < 1:4.2.6.p2+dfsg-1+deb6u3 | ntp_1:4.2.6.p2+dfsg-1+deb6u3_i386.deb |
Debian | 7 | kfreebsd-i386 | ntp | < 1:4.2.6.p5+dfsg-2+deb7u4 | ntp_1:4.2.6.p5+dfsg-2+deb7u4_kfreebsd-i386.deb |
Debian | 6 | amd64 | ntpdate | < 1:4.2.6.p2+dfsg-1+deb6u3 | ntpdate_1:4.2.6.p2+dfsg-1+deb6u3_amd64.deb |
Debian | 7 | s390 | ntp | < 1:4.2.6.p5+dfsg-2+deb7u4 | ntp_1:4.2.6.p5+dfsg-2+deb7u4_s390.deb |
Debian | 7 | kfreebsd-amd64 | ntp | < 1:4.2.6.p5+dfsg-2+deb7u4 | ntp_1:4.2.6.p5+dfsg-2+deb7u4_kfreebsd-amd64.deb |
Debian | 7 | i386 | ntpdate | < 1:4.2.6.p5+dfsg-2+deb7u4 | ntpdate_1:4.2.6.p5+dfsg-2+deb7u4_i386.deb |
Debian | 7 | armhf | ntpdate | < 1:4.2.6.p5+dfsg-2+deb7u4 | ntpdate_1:4.2.6.p5+dfsg-2+deb7u4_armhf.deb |
Debian | 7 | mipsel | ntpdate | < 1:4.2.6.p5+dfsg-2+deb7u4 | ntpdate_1:4.2.6.p5+dfsg-2+deb7u4_mipsel.deb |