drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Pufferüberlauf in flex
Name: |
Pufferüberlauf in flex |
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ID: |
200603-07 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Fr, 10. März 2006, 22:06 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0459 |
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Applikationen: |
Fast Lexical Analyzer Generator |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200603-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: flex: Potential insecure code generation Date: March 10, 2006 Bugs: #122940 ID: 200603-07
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Synopsis ========
flex might generate code with a buffer overflow, making applications using such scanners vulnerable to the execution of arbitrary code.
Background ==========
flex is a programming tool used to generate scanners (programs which recognize lexical patterns in text).
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-devel/flex < 2.5.33-r1 >= 2.5.33-r1
Description ===========
Chris Moore discovered a buffer overflow in a special class of lexicographical scanners generated by flex. Only scanners generated by grammars which use either REJECT, or rules with a "variable trailing context" might be at risk.
Impact ======
An attacker could feed malicious input to an application making use of an affected scanner and trigger the buffer overflow, potentially resulting in the execution of arbitrary code.
Workaround ==========
Avoid using vulnerable grammar in your flex scanners.
Resolution ==========
All flex users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-devel/flex-2.5.33-r1"
References ==========
[ 1 ] CVE-2006-0459 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0459
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200603-07.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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