module

Cyrus IMAPD pop3d popsubfolders USER Buffer Overflow

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Disclosed
2006-05-21
Created
2018-05-30

Description

This exploit takes advantage of a stack based overflow. Once the stack
corruption has occurred it is possible to overwrite a pointer which is
later used for a memcpy. This gives us a write anything anywhere condition
similar to a format string vulnerability.

NOTE: The popsubfolders option is a non-default setting.

I chose to overwrite the GOT with my shellcode and return to it. This
defeats the VA random patch and possibly other stack protection features.

Tested on gentoo-sources Linux 2.6.16. Although Fedora CORE 5 ships with
a version containing the vulnerable code, it is not exploitable due to the
use of the FORTIFY_SOURCE compiler enhancement.

Authors

bannedit bannedit@metasploit.com
jduck jduck@metasploit.com

Platform

Linux

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use exploit/linux/pop3/cyrus_pop3d_popsubfolders
    msf exploit(cyrus_pop3d_popsubfolders) > show targets
        ...targets...
    msf exploit(cyrus_pop3d_popsubfolders) > set TARGET < target-id >
    msf exploit(cyrus_pop3d_popsubfolders) > show options
        ...show and set options...
    msf exploit(cyrus_pop3d_popsubfolders) > exploit
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