Description of problem:
Does not escape names of symlinks when producing a script to be
passed to the shell, which could be abused by an attacked to
trick the user into executing arbitrary code with crafted symbolic
Version-Release number of selected component (if applicable):
Doesn't Affect: RHEL2.1 no support for --script
Doesn't Affect: RHEL3 ditto
Steps to Reproduce:
1. ln -s '$(touch /tmp/gotya; echo kwak)' malicious
2. serve that file via ftp and attempt to download it with lftp via mirror --script
3. Try to run the resulting script with lftp -f
The downloaded file will point to "kwak", while file /tmp/gotya will be
The security implications are questionable, as is the usefullness of the
--script feature itself.
This issue has been addressed in following products:
Red Hat Enterprise Linux 5
Via RHSA-2009:1278 https://rhn.redhat.com/errata/RHSA-2009-1278.html
Reporter changed to email@example.com by request of Jay Turner.
This issue does not affect lftp as supplied with Red Hat Enterprise Linux 3.
This issue was addressed for Red Hat Enterprise Linux 5 by
The Red Hat Security Response Team has rated this issue as having low security impact, this issue will not fixed in Red Hat Enterprise Linux 4.