Debians sikkerhedsbulletin

DSA-403-1 kernel-image-2.4.18-1-alpha, kernel-image-2.4.18-1-i386, kernel-source-2.4.18 -- lokal root-udnyttelse

Rapporteret den:
1. dec 2003
Berørte pakker:
kernel-image-2.4.18-1-alpha
kernel-image-2.4.18-1-i386
kernel-source-2.4.18
Sårbar:
Ja
Referencer i sikkerhedsdatabaser:
I Bugtraq-databasen (hos SecurityFocus): BugTraq-id 9138.
I Mitres CVE-ordbog: CVE-2003-0961.
Yderligere oplysninger:

Nyligt blev der begået indbrud i adskillige af Debian-projektets servere ved hjælp af en Debian-udviklers konto og en ukendt root-udnyttelse. En teknisk analyse afslørende anvendelsen af krypteret burneye-udnyttelse. Det lykkedes Robert van der Meulen at dekryptere den binære fil, hvilket afslørende en kerneudnyttelse. Red Hats og SuSEs kerne- og sikkerhedsholds granskning af udnyttelsen afslørede hurtigt at udnyttelsen anvendte et heltalsoverløb i systemkaldet "brk". Ved hjælp af denne fejl er det muligt for et userland-program at snyde kerne til at give adgang til kernes komplette adresserum. Dette problem blev opdaget i september af Andrew Morton, men desværre for sent til at komme med i 2.4.22-udgaven af kernen.

Denne fejl er rettet i kerne version 2.4.23 i 2.4-træet og 2.6.0-test6-kernetræet. I Debian er det rettet i version 2.4.18-14 af pakken med kernens kildekode, version 2.4.18-12 af i386-kerneaftrykkene og version 2.4.18-11 af alpha-kerneaftrykkene.

Rettet i:

Debian GNU/Linux 3.0 (stable)

Kildekode:
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-i386_2.4.18-12.tar.gz
http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-source-2.4.18_2.4.18.orig.tar.gz
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-alpha_2.4.18-11.dsc
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-alpha_2.4.18-11.tar.gz
http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-source-2.4.18_2.4.18-14.dsc
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-i386_2.4.18-12.dsc
http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-source-2.4.18_2.4.18-14.diff.gz
Arkitekturuafhængig komponent:
http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-doc-2.4.18_2.4.18-14_all.deb
http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-source-2.4.18_2.4.18-14_all.deb
Alpha:
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-headers-2.4.18-1-smp_2.4.18-11_alpha.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-headers-2.4.18-1_2.4.18-11_alpha.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-headers-2.4.18-1-generic_2.4.18-11_alpha.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-smp_2.4.18-11_alpha.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-generic_2.4.18-11_alpha.deb
Intel IA-32:
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-k7_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2.4.18-1-k7_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-386_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2.4.18-1-686-smp_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2.4.18-1-686_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1-586tsc_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1-686-smp_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2.4.18-1-386_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2.4.18-1-586tsc_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-586tsc_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1-386_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-k6_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2.4.18-1-k6_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1-686_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1-k7_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-686-smp_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1-k6_2.4.18-12_i386.deb
http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-686_2.4.18-12_i386.deb

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