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Link Grammar "separate_sentence()" Buffer Overflow
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Secunia Advisory:
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SA27300
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Release Date:
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2007-11-07
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Popularity:
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2,876 views
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Critical:
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Moderately critical
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Impact:
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System access
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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: | Link Grammar 4.x
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| CVE reference: | CVE-2007-5395
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Description:
Secunia Research has discovered a vulnerability in Link Grammar, which can be exploited by malicious people to compromise an application using the affected code.
The vulnerability is caused due to a boundary error within the "separate_word()" function in tokenize.c when processing overly long words (over 61 bytes). This can be exploited to cause a stack-based buffer overflow via a specially crafted sentence passed to the "separate_sentence()" function.
Successful exploitation allows execution of arbitrary code.
The vulnerability is confirmed in version 4.1b. Other versions may also be affected.
Solution:
Do not parse untrusted text using the affected function.
Provided and/or discovered by:
Alin Rad Pop, Secunia Research
Original Advisory:
Secunia Research:
http://secunia.com/secunia_research/2007-78/
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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.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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