AbiWord Link Grammar and Link Grammar separate_sentence() buffer overflow
| abiword-linkgrammar-sentence-bo (38317) |  High Risk |
Description:
AbiWord Link Grammar and Link Grammar are vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the separate_word() function. By passing a specially-crafted sentence containing overly long words to the separate_sentence() function, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
Platforms Affected:
- AbiSource, AbiWord Link Grammar 4.2.4
- Canonical, Ubuntu 7.10
- Davy Temperley, Daniel Sleator and John Lafferty, Link Grammar 4.1b
- Debian, Debian Linux 4.0
- Gentoo, Linux
Remedy:
For AbiWord Link Grammar:
Apply the patch for this vulnerability, available from the ABI SVN Repository. See References.
For other distributions:
Apply the appropriate update for your system. See References.
Consequences:
Gain Access
References:
- ABI SVN Repository, Revision 22295: / at http://svn.abisource.com/.
- AbiWord Link Grammar Web site, AbiWord Link Grammar at http://www.abisource.com/.
- Link Grammar Web site, Link Grammar at http://www.link.cs.cmu.edu/link/.
- Secunia Research 07/11/2007, AbiWord Link Grammar "separate_sentence()" Buffer Overflow at http://secunia.com/secunia_research/2007-79/advisory/.
- Secunia Research 07/11/2007, Link Grammar "separate_sentence()" Buffer Overflow at http://secunia.com/secunia_research/2007-78/advisory/.
- BID-26365: Link Grammar SEPARATE_WORD Function Remote Buffer Overflow Vulnerability
- CVE-2007-5395: Stack-based buffer overflow in the separate_word function in tokenize.c in Link Grammar 4.1b and possibly other versions, as used in AbiWord Link Grammar 4.2.4, allows remote attackers to execute arbitrary code via a long word, as reachable through the separate_sentence function.
- DSA-1432: link-grammar -- buffer overflow
- FrSIRT/ADV-2007-3770: Link Grammar separate_sentence() Function Buffer Overflow Vulnerability
- FrSIRT/ADV-2007-3771: AbiWord Link Grammar separate_sentence() Remote Buffer Overflow
- GLSA-200711-27: Link Grammar: User-assisted execution of arbitrary code
- SA27300: Link Grammar "separate_sentence()" Buffer Overflow
- SA27340: AbiWord Link Grammar "separate_sentence()" Buffer Overflow
- USN-545-1: link-grammar vulnerability
Reported:
Nov 07, 2007
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