BugTraq
Linux Mint 8 mintUpdate Insecure Temporary File Creation May 19 2010 08:07PM
L4teral (l4teral gmail com)
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Linux Mint 8 mintUpdate Insecure Temporary File Creation
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Author: L4teral <l4teral [at] gmail com>
Impact: Privilege Escalation
Status: Update available

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Affected software description:
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Application: mintUpdate (Linux Mint)
Version: Linux Mint 8
Vendor: http://linuxmint.com

Description:
Linux Mint's purpose is to produce an elegant, up to date and
comfortable GNU/Linux desktop distribution.

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Vulnerability:
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The Linux Mint update tool mintUpdate creates temporary files in the
/tmp/mintUpdate/ directory in an insecure way. This can be exploited
to overwrite restricted files via symlink attacks.

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PoC/Exploit:
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The symlinks must exist when the user clicks on the mintUpdate Icon.
After requesting root privileges via sudo, the update tool overwrites
the target file with log data. This could be exploited to destroy
crucial system files.

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Solution:
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Update to Linux Mint 9
or apply the following patch:
http://github.com/linuxmint/mintupdate/commit/301993906c694eb119cd961481
7de57e7b0c874c

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Timeline:
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2010-03-08 - vendor informed
2010-03-17 - vendor response, patched in source repository
2010-05-18 - Linux Mint 9 released, public disclosure

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