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DConnect Daemon Multiple Vulnerabilities
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Secunia Advisory:
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SA21384
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Release Date:
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2006-08-07
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Last Update:
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2006-08-18
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Popularity:
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4,381 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | DConnect Daemon 0.x
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2006-4125
CVE-2006-4126
CVE-2006-4127
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Description:
Luigi Auriemma has reported some vulnerabilities in DConnect Daemon, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
1) A boundary error in the "listen_thread_udp()" function in main.c can be exploited to cause a stack-based buffer overflow by sending a UDP packet with an overly long nickname to the service.
Successful exploitation may allow execution of arbitrary code, but requires that the "min_slots" parameter in dcd.conf is enabled.
NOTE: The UDP port is reportedly disabled by default.
2) A NULL pointer dereference error exists in the "dc_chat()" function in cmd.dc.c when handling client messages. This can be exploited to crash the service by sending a message before sending the nickname.
3) Some format string errors exist in various functions due to unsafe usage of the "privmsg()" and "pubmsg()" functions when sending messages. This can potentially be exploited to execute arbitrary code via specially crafted messages.
Successful exploitation of this vulnerability requires superior user or administrator privileges.
The vulnerabilities have been reported in version 0.7.0. Other versions may also be affected.
Solution:
The vulnerabilities have been fixed in the CVS repository.
Provided and/or discovered by:
Luigi Auriemma
Changelog:
2006-08-18: Added CVE references.
Original Advisory:
http://aluigi.altervista.org/adv/dconnx-adv.txt
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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