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eStara SoftPhone SIP Packet Handling Denial of Service
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Secunia Advisory:
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SA18872
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Release Date:
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2006-02-15
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Last Update:
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2006-02-23
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Popularity:
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5,137 views
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Critical:
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Moderately critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | eStara SoftPhone 3.x
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| CVE reference: | CVE-2006-0737
CVE-2006-0738
CVE-2006-0739
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Description:
ZwelL has discovered some vulnerabilities in eStara SoftPhone, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerabilities are caused due to errors within the handling of certain SIP packets sent to 5060/udp. This can be exploited to crash the SoftPhone client or cause it to stop responding via specially crafted SIP packets containing a negative value in the "Expires" header, or containing a "Content-Length" header with a value of more than 9 characters, or via SIP packets with SDP data containing format specifiers.
The vulnerabilities have been confirmed in version 3.0.1.47. Other versions may also be affected.
Solution:
Restrict use to within trusted networks only.
Provided and/or discovered by:
ZwelL
Changelog:
2006-02-23: Added CVE references.
Original Advisory:
http://www.nosec.org/web/?q=node/12
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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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