Bug 38244 - ntp: multiple issues (4.0)
ntp: multiple issues (4.0)
Product: UCS
Classification: Unclassified
Component: Security updates
UCS 4.0
Other Linux
: P5 normal (vote)
: UCS 4.0-2-errata
Assigned To: Janek Walkenhorst
Philipp Hahn
Depends on:
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Reported: 2015-04-13 14:34 CEST by Arvid Requate
Modified: 2015-06-17 18:13 CEST (History)
2 users (show)

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Description Arvid Requate univentionstaff 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 univentionstaff 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 univentionstaff 2015-06-05 16:01:47 CEST
Tests (i386): OK
Advisory: 2015-06-05-ntp.yaml
Comment 3 Philipp Hahn univentionstaff 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 univentionstaff 2015-06-17 18:13:26 CEST