[IT-SecNots] [SECURITY] [DSA 3223-1] ntp security update

[Alessandro Ghedini <ghedo AT debian.org>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3223-1                   security AT debian.org
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: debian-security-announce AT lists.debian.org
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=QGoI
-----END PGP SIGNATURE-----


-- 
To UNSUBSCRIBE, email to debian-security-announce-REQUEST AT lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listmaster AT lists.debian.org
Archive: 20150412162923.2349B39B AT bendel.debian.org">https://lists.debian.org/20150412162923.2349B39B AT bendel.debian.org