Debians sikkerhedsbulletin

DSA-259-1 qpopper -- rettighedsforøgelse af mail-brugeren

Rapporteret den:

12. mar 2003

Berørte pakker:

qpopper

Sårbar:

Referencer i sikkerhedsdatabaser:

I Mitres CVE-ordbog: CVE-2003-0143.

Yderligere oplysninger:

Florian Heinz heinz@cronon-ag.de har på postlisten Bugtraq skrevet om en udnyttelse i qpopper, baseret på en fejl i den indeholdte implementering af snprintf. Prøveudnyttelsen kræver en gyldig brugerkonto og adgangskode, og får en streng i funktionen pop_msg() til at løbe over, hvilket giver brugeren "mail" grupperettigheder og shell-adgang på systemet. Da funktionen Qvsnprintf anvendes andre steder i qpopper, kan der flere udnyttelser være mulige.

qpopper-pakken i Debian 2.2 (potato) indeholder ikke den sårbare implementering af snprintf. I Debian 3.0 (woody) er en opdateret pakke tilgængelig som version 4.0.4-2.woody.3. Brugere den kører en uudgiven udgave af Debian bør opgradere til 4.0.4-9 eller nyere. Vi anbefaler at du omgående opgraderer din qpopper-pakke.

Rettet i:

Debian GNU/Linux 3.0 (stable)

Kildekode:: http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3.diff.gz; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4.orig.tar.gz; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3.dsc
alpha (DEC Alpha):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_alpha.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_alpha.deb
arm (ARM):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_arm.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_arm.deb
hppa (HP PA RISC):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_hppa.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_hppa.deb
i386 (Intel ia32):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_i386.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_i386.deb
ia64 (Intel ia64):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_ia64.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_ia64.deb
m68k (Motorola Mc680x0):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_m68k.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_m68k.deb
mips (MIPS (Big Endian)):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_mips.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_mips.deb
mipsel (MIPS (Little Endian)):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_mipsel.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_mipsel.deb
powerpc (PowerPC):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_powerpc.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_powerpc.deb
s390 (IBM S/390):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_s390.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_s390.deb
sparc (Sun SPARC/UltraSPARC):: http://security.debian.org/pool/updates/main/q/qpopper/qpopper-drac_4.0.4-2.woody.3_sparc.deb; http://security.debian.org/pool/updates/main/q/qpopper/qpopper_4.0.4-2.woody.3_sparc.deb

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