Bug 38244 – ntp: multiple issues (4.0)

Bug 38244 - ntp: multiple issues (4.0)


Summary:	ntp: multiple issues (4.0)

Status:	CLOSED FIXED

Product:	UCS
Classification:	Unclassified
Component:	Security updates
Version:	UCS 4.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 4.0-2-errata
Assigned To:	Janek Walkenhorst
QA Contact:	Philipp Hahn

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Reported:	2015-04-13 14:34 CEST by Arvid Requate
Modified:	2015-06-17 18:13 CEST (History)
CC List:	2 users (show)

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Description Arvid Requate

2015-04-13 14:34:52 CEST

Man-in-the-middle attackers may spoof packets by omitting the MAC because the symmetric-key feature in the receive function in ntp_proto.c requires a correct MAC only if the MAC field has a nonzero length (CVE-2015-1798)

Man-in-the-middle attackers may cause a denial of service (synchronization loss) by spoofing the source IP address of a peer because the symmetric-key feature in the receive function in ntp_proto.c performs state-variable updates upon receiving certain invalid packets (CVE-2015-1799)

Comment 1 Arvid Requate

2015-05-06 16:23:06 CEST

Fixed in upstream Debian package version 1:4.2.6.p5+dfsg-2+deb7u4

Comment 2 Janek Walkenhorst

2015-06-05 16:01:47 CEST

Tests (i386): OK
Advisory: 2015-06-05-ntp.yaml

Comment 3 Philipp Hahn

2015-06-15 11:08:42 CEST

OK: amd64 i386
OK: apt-cache policy ntp
OK: ucr set timeserver{=1,2=2,3=3}.debian.pool.ntp.org;/etc/init.d/ntp restart;ntpq -p
OK: zless /usr/share/doc/ntp/changelog.Debian.gz
FIXED: 2015-06-05-ntp.yaml → r61249
OK: CVE-2015-1798 CVE-2015-1799
OK: errata-announce -V 2015-06-05-ntp.yaml

Comment 4 Janek Walkenhorst

2015-06-17 18:13:26 CEST

<http://errata.univention.de/ucs/4.0/212.html>