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[ GLSA 200711-27 ] Link Grammar: User-assisted execution of arbitrary code
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PostPosted: Mon Nov 19, 2007 2:26 am    Post subject: [ GLSA 200711-27 ] Link Grammar: User-assisted execution of Reply with quote

Gentoo Linux Security Advisory

Title: Link Grammar: User-assisted execution of arbitrary code (GLSA 200711-27)
Severity: normal
Exploitable: remote
Date: November 18, 2007
Bug(s): #196803
ID: 200711-27

Synopsis

A buffer overflow vulnerability has been discovered in Link Grammar.

Background

The Link Grammar parser is a syntactic parser of English, based on link grammar, an original theory of English syntax.

Affected Packages

Package: dev-libs/link-grammar
Vulnerable: < 4.2.4-r1
Unaffected: >= 4.2.4-r1
Architectures: All supported architectures


Description

Alin Rad Pop from Secunia Research discovered a boundary error in the function separate_sentence() in file tokenize.c when processing an overly long word which might lead to a stack-based buffer overflow.

Impact

A remote attacker could entice a user to parse a specially crafted sentence, resulting in the remote execution of arbitrary code with the privileges of the user running the application. Note that this vulnerability may be triggered by an application using Link Grammar to parse sentences (e.g. AbiWord).

Workaround

There is no known workaround at this time.

Resolution

All Link Grammar users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/link-grammar-4.2.4-r1"


References

CVE-2007-5395
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