(Sun Issues Fix) ICU Regular Expression Processing Bug May Let Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1019573 |
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SecurityTracker URL: http://securitytracker.com/id/1019573
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CVE Reference:
CVE-2007-4770, CVE-2007-4771
(Links to External Site)
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Date: Mar 11 2008
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Impact:
Denial of service via network, Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 3.8.1 and prior versions
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Description:
Two vulnerabilities were reported in ICU. A user may be able to cause arbitrary code to be executed on the target system.
A user can create a specially crafted regular expression that, when processed by an application that uses ICU, will trigger a memory corruption error and potentially execute arbitrary code on the target system. The code will run with the privileges of the target application.
If an application allows a remote user to submit arbitrary regular expressions, then a remote user may be able to exploit this flaw.
A regular expression pattern that contains a back reference to capture group zero (\0), which does not exist, may establish references to random memory addresses [CVE-2007-4770].
The doInterval() function in 'regexcmp.cpp' does not properly limit the size of the backtracking stack, allowing a heap overflow to be triggered [CVE-2007-4771].
Will Drewry reported these vulnerabilities.
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Impact:
A user can create a regular expression that, when processed by the target application, may execute arbitrary code on the target system.
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Solution:
Sun has issued a fix.
SPARC platform:
* Solaris 9 with patch 114677-15 or later
* Solaris 10 with patch 119810-05 or later
X86 platform:
* Solaris 9 with patch 114678-15 or later
* Solaris 10 with patch 119811-05 or later
The Sun advisory is available at:
http://sunsolve.sun.com/search/document.do?assetkey=1-66-233922-1
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Vendor URL: icu-project.org/ (Links to External Site)
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Cause:
Boundary error, Input validation error
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Underlying OS:
UNIX (Solaris - SunOS)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Mon, 10 Mar 2008 22:01:15 -0500
Subject: http://sunsolve.sun.com/search/document.do?assetkey=1-66-233922-1
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CVE-2007-4770
CVE-2007-4771
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