Bug 236240 - CVE-2007-2348 lftp mirror --script does not escape names and targets of symbolic links
CVE-2007-2348 lftp mirror --script does not escape names and targets of symbo...
Status: CLOSED CURRENTRELEASE
Product: Fedora
Classification: Fedora
Component: lftp (Show other bugs)
6
All Linux
low Severity low
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Assigned To: Martin Nagy
http://lftp.yar.ru/news.html
impact=low,source=gentoo,reported=200...
: Security
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2007-04-12 12:49 EDT by Lubomir Kundrak
Modified: 2016-07-26 19:46 EDT (History)
2 users (show)

See Also:
Fixed In Version: lftp-3.5.10-4.fc7
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2008-01-05 20:09:03 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Lubomir Kundrak 2007-04-12 12:49:45 EDT
+++ This bug was initially created as a clone of Bug #236238 +++

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
link.

Version-Release number of selected component (if applicable):

        Doesn't Affect: RHEL2.1 no support for --script
        Doesn't Affect: RHEL3 ditto
        Affects: RHEL4
        Affects: RHEL5
        Affects: FC5
        Affects: FC6

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
  
Actual results:

The downloaded file will point to "kwak", while file /tmp/gotya will be
created.

Additional info:

The security implications are questionable, as is the usefullness of the
--script feature itself.
Comment 1 Till Maas 2008-01-05 20:09:03 EST
In Fedora 7, there is lftp-3.5.10-4.fc7, which has this vulnerability fixed.

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