Debians sikkerhedsbulletin

DSA-1948-1 ntp -- denial of service

Rapporteret den:

8. dec 2009

Berørte pakker:

ntp

Sårbar:

Referencer i sikkerhedsdatabaser:

I Debians fejlsporingssystem: Fejl 560074.
I Mitres CVE-ordbog: CVE-2009-3563.

Yderligere oplysninger:

Robin Park og Dmitri Vinokurov opdagede at dæmonkomponenten i ntp-pakken, en referenceimplementering af NTP-protokollen, ikke reagerede korrekt på visse indgående netværkspakker.

En uventet NTP mode 7-pakke (MODE_PRIVATE) med forfalskede IP-data, kunne føre til at ntpd gav et mode 7-svar til den forfalskede adresse. Det kunne medføre at tjenesten legede pakke-bordtennis med andre ntp-servere eller endda sig selv, hvilket forårsagede CPU-forbrug og overdreven brug af diskplads på grund af logning. En angriber kunne anvende dette til at udføre lammelsesangreb (denial of service).

I den gamle stabile distribution (etch), er dette problem rettet i version 1:4.2.2.p4+dfsg-2etch4.

I den stabile distribution (lenny), er dette problem rettet i version 1:4.2.4p4+dfsg-8lenny3.

I distributionen testing (squeeze) og i den ustabile distribution (sid), vil dette problem snart blive rettet.

Vi anbefaler at du opgraderer dine ntp-pakker.

Rettet i:

Debian GNU/Linux 4.0 (etch)

Kildekode:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4.dsc; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg.orig.tar.gz; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4.diff.gz
Arkitekturuafhængig komponent:: http://security.debian.org/pool/updates/main/n/ntp/ntp-refclock_4.2.2.p4+dfsg-2etch4_all.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp-simple_4.2.2.p4+dfsg-2etch4_all.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp-doc_4.2.2.p4+dfsg-2etch4_all.deb
Alpha:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_alpha.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_alpha.deb
AMD64:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_amd64.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_amd64.deb
ARM:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_arm.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_arm.deb
HP Precision:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_hppa.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_hppa.deb
Intel IA-32:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_i386.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_i386.deb
Intel IA-64:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_ia64.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_ia64.deb
Big-endian MIPS:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_mips.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_mips.deb
Little-endian MIPS:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_mipsel.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_mipsel.deb
PowerPC:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_powerpc.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_powerpc.deb
IBM S/390:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_s390.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_s390.deb
Sun Sparc:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch4_sparc.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch4_sparc.deb

Debian GNU/Linux 5.0 (lenny)

Kildekode:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3.dsc; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg.orig.tar.gz; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3.diff.gz
Arkitekturuafhængig komponent:: http://security.debian.org/pool/updates/main/n/ntp/ntp-doc_4.2.4p4+dfsg-8lenny3_all.deb
Alpha:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_alpha.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_alpha.deb
AMD64:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_amd64.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_amd64.deb
ARM:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_arm.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_arm.deb
ARM EABI:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_armel.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_armel.deb
HP Precision:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_hppa.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_hppa.deb
Intel IA-32:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_i386.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_i386.deb
Intel IA-64:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_ia64.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_ia64.deb
Big-endian MIPS:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_mips.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_mips.deb
Little-endian MIPS:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_mipsel.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_mipsel.deb
PowerPC:: http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_powerpc.deb; http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_powerpc.deb
IBM S/390:: http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.4p4+dfsg-8lenny3_s390.deb; http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.4p4+dfsg-8lenny3_s390.deb

MD5-kontrolsummer for de listede filer findes i den originale sikkerhedsbulletin.