ID CVE-2007-4825
Summary Directory traversal vulnerability in PHP 5.2.4 and earlier allows attackers to bypass open_basedir restrictions and possibly execute arbitrary code via a .. (dot dot) in the dl function.
References
Vulnerable Configurations
  • PHP 5.2.3
    cpe:2.3:a:php:php:5.2.3
CVSS
Base: 7.5 (as of 12-09-2007 - 22:00)
Impact:
Exploitability:
CWE CWE-22
CAPEC
  • Relative Path Traversal
    An attacker exploits a weakness in input validation on the target by supplying a specially constructed path utilizing dot and slash characters for the purpose of obtaining access to arbitrary files or resources. An attacker modifies a known path on the target in order to reach material that is not available through intended channels. These attacks normally involve adding additional path separators (/ or \) and/or dots (.), or encodings thereof, in various combinations in order to reach parent directories or entirely separate trees of the target's directory structure.
  • Directory Traversal
    An attacker with access to file system resources, either directly or via application logic, will use various file path specification or navigation mechanisms such as ".." in path strings and absolute paths to extend their range of access to inappropriate areas of the file system. The attacker attempts to either explore the file system for recon purposes or access directories and files that are intended to be restricted from their access. Exploring the file system can be achieved through constructing paths presented to directory listing programs, such as "ls" and 'dir', or through specially crafted programs that attempt to explore the file system. The attacker engaging in this type of activity is searching for information that can be used later in a more exploitive attack. Access to restricted directories or files can be achieved through modification of path references utilized by system applications.
  • File System Function Injection, Content Based
    An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
  • Using Slashes and URL Encoding Combined to Bypass Validation Logic
    This attack targets the encoding of the URL combined with the encoding of the slash characters. An attacker can take advantage of the multiple way of encoding an URL and abuse the interpretation of the URL. An URL may contain special character that need special syntax handling in order to be interpreted. Special characters are represented using a percentage character followed by two digits representing the octet code of the original character (%HEX-CODE). For instance US-ASCII space character would be represented with %20. This is often referred as escaped ending or percent-encoding. Since the server decodes the URL from the requests, it may restrict the access to some URL paths by validating and filtering out the URL requests it received. An attacker will try to craft an URL with a sequence of special characters which once interpreted by the server will be equivalent to a forbidden URL. It can be difficult to protect against this attack since the URL can contain other format of encoding such as UTF-8 encoding, Unicode-encoding, etc.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
  • Using Escaped Slashes in Alternate Encoding
    This attack targets the use of the backslash in alternate encoding. An attacker can provide a backslash as a leading character and causes a parser to believe that the next character is special. This is called an escape. By using that trick, the attacker tries to exploit alternate ways to encode the same character which leads to filter problems and opens avenues to attack.
  • Using Slashes in Alternate Encoding
    This attack targets the encoding of the Slash characters. An attacker would try to exploit common filtering problems related to the use of the slashes characters to gain access to resources on the target host. Directory-driven systems, such as file systems and databases, typically use the slash character to indicate traversal between directories or other container components. For murky historical reasons, PCs (and, as a result, Microsoft OSs) choose to use a backslash, whereas the UNIX world typically makes use of the forward slash. The schizophrenic result is that many MS-based systems are required to understand both forms of the slash. This gives the attacker many opportunities to discover and abuse a number of common filtering problems. The goal of this pattern is to discover server software that only applies filters to one version, but not the other.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
nessus via4
  • NASL family SuSE Local Security Checks
    NASL id SUSE_APACHE2-MOD_PHP5-4810.NASL
    description This update fixes multiple bugs in php : - use system pcre library to fix several pcre vulnerabilities (CVE-2007-1659, CVE-2006-7230, CVE-2007-1660, CVE-2006-7227 CVE-2005-4872, CVE-2006-7228) - Flaws in processing multi byte sequences in htmlentities/htmlspecialchars (CVE-2007-5898) - overly long arguments to the dl() function could crash php (CVE-2007-4825) - overy long arguments to the glob() function could crash php (CVE-2007-4782) - overly long arguments to some iconv functions could crash php (CVE-2007-4840) - overy long arguments to the setlocale() function could crash php (CVE-2007-4784) - the wordwrap-Function could cause a floating point exception (CVE-2007-3998) - overy long arguments to the fnmatch() function could crash php (CVE-2007-4782) - incorrect size calculation in the chunk_split function could lead to a buffer overflow (CVE-2007-4661) - Flaws in the GD extension could lead to integer overflows (CVE-2007-3996) - The money_format function contained format string flaws (CVE-2007-4658) - Data for some time zones has been updated
    last seen 2019-02-21
    modified 2018-07-19
    plugin id 29878
    published 2008-01-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=29878
    title openSUSE 10 Security Update : apache2-mod_php5 (apache2-mod_php5-4810)
  • NASL family SuSE Local Security Checks
    NASL id SUSE9_12049.NASL
    description This update fixes multiple bugs in php : - several problems in pcre (CVE-2007-1660, CVE-2006-7225, CVE-2006-7224, CVE-2006-7226 CVE-2007-1659, CVE-2006-7230) - Flaws in processing multi byte sequences in htmlentities/htmlspecialchars. (CVE-2007-5898) - overly long arguments to the dl() function could crash php. (CVE-2007-4825) - overy long arguments to the glob() function could crash php. (CVE-2007-4782) - overly long arguments to some iconv functions could crash php. (CVE-2007-4840) - overy long arguments to the setlocale() function could crash php. (CVE-2007-4784) - the wordwrap-Function could cause a floating point exception. (CVE-2007-3998) - overy long arguments to the fnmatch() function could crash php. (CVE-2007-4782) - incorrect size calculation in the chunk_split function could lead to a buffer overflow. (CVE-2007-4661, CVE-2007-2872) - Flaws in the GD extension could lead to integer overflows. (CVE-2007-3996) - The money_format function contained format string flaws. (CVE-2007-4658)
    last seen 2019-02-21
    modified 2016-12-21
    plugin id 41187
    published 2009-09-24
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=41187
    title SuSE9 Security Update : PHP4 (YOU Patch Number 12049)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_APACHE2-MOD_PHP5-4808.NASL
    description This update fixes multiple bugs in php : - use system pcre library to fix several pcre vulnerabilities. (CVE-2007-1659 / CVE-2006-7230 / CVE-2007-1660 / CVE-2006-7227 / CVE-2005-4872 / CVE-2006-7228) - Flaws in processing multi byte sequences in htmlentities/htmlspecialchars. (CVE-2007-5898) - overly long arguments to the dl() function could crash php. (CVE-2007-4825) - overy long arguments to the glob() function could crash php. (CVE-2007-4782) - overly long arguments to some iconv functions could crash php. (CVE-2007-4840) - overy long arguments to the setlocale() function could crash php. (CVE-2007-4784) - the wordwrap-Function could cause a floating point exception. (CVE-2007-3998) - overy long arguments to the fnmatch() function could crash php. (CVE-2007-4782) - incorrect size calculation in the chunk_split function could lead to a buffer overflow. (CVE-2007-4661) - Flaws in the GD extension could lead to integer overflows. (CVE-2007-3996) - The money_format function contained format string flaws. (CVE-2007-4658) - Data for some time zones has been updated
    last seen 2019-02-21
    modified 2016-12-22
    plugin id 29780
    published 2007-12-24
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=29780
    title SuSE 10 Security Update : PHP5 (ZYPP Patch Number 4808)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_APACHE2-MOD_PHP5-4909.NASL
    description This update fixes multiple bugs in php by upgrading it to version 5.2.5. - Flaws in processing multi byte sequences in htmlentities/htmlspecialchars (CVE-2007-5898) - overly long arguments to the dl() function could crash php (CVE-2007-4825) - overy long arguments to the glob() function could crash php (CVE-2007-4782) - overly long arguments to some iconv functions could crash php (CVE-2007-4840) - overy long arguments to the setlocale() function could crash php (CVE-2007-4784) - the wordwrap-Function could cause a floating point exception (CVE-2007-3998) - overy long arguments to the fnmatch() function could crash php (CVE-2007-4782) - incorrect size calculation in the chunk_split function could lead to a buffer overflow (CVE-2007-4661, CVE-2007-2872) - Flaws in the GD extension could lead to integer overflows (CVE-2007-3996) - The money_format function contained format string flaws (CVE-2007-4658) - Data for some time zones has been updated - php5 has been updated to version 5.2.5 to fix those problems
    last seen 2019-02-21
    modified 2018-07-19
    plugin id 30092
    published 2008-01-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=30092
    title openSUSE 10 Security Update : apache2-mod_php5 (apache2-mod_php5-4909)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-200710-02.NASL
    description The remote host is affected by the vulnerability described in GLSA-200710-02 (PHP: Multiple vulnerabilities) Several vulnerabilities were found in PHP. Mattias Bengtsson and Philip Olausson reported integer overflows in the gdImageCreate() and gdImageCreateTrueColor() functions of the GD library which can cause heap-based buffer overflows (CVE-2007-3996). Gerhard Wagner discovered an integer overflow in the chunk_split() function that can lead to a heap-based buffer overflow (CVE-2007-2872). Its incomplete fix caused incorrect buffer size calculation due to precision loss, also resulting in a possible heap-based buffer overflow (CVE-2007-4661 and CVE-2007-4660). A buffer overflow in the sqlite_decode_binary() of the SQLite extension found by Stefan Esser that was addressed in PHP 5.2.1 was not fixed correctly (CVE-2007-1887). Stefan Esser discovered an error in the zend_alter_ini_entry() function handling a memory_limit violation (CVE-2007-4659). Stefan Esser also discovered a flaw when handling interruptions with userspace error handlers that can be exploited to read arbitrary heap memory (CVE-2007-1883). Disclosure of sensitive memory can also be triggered due to insufficient boundary checks in the strspn() and strcspn() functions, an issue discovered by Mattias Bengtsson and Philip Olausson (CVE-2007-4657) Stefan Esser reported incorrect validation in the FILTER_VALIDATE_EMAIL filter of the Filter extension allowing arbitrary email header injection (CVE-2007-1900). NOTE: This CVE was referenced, but not fixed in GLSA 200705-19. Stanislav Malyshev found an error with unknown impact in the money_format() function when processing '%i' and '%n' tokens (CVE-2007-4658). zatanzlatan reported a buffer overflow in the php_openssl_make_REQ() function with unknown impact when providing a manipulated SSL configuration file (CVE-2007-4662). Possible memory corruption when trying to read EXIF data in exif_read_data() and exif_thumbnail() occurred with unknown impact. Several vulnerabilities that allow bypassing of open_basedir and other restrictions were reported, including the glob() function (CVE-2007-4663), the session_save_path(), ini_set(), and error_log() functions which can allow local command execution (CVE-2007-3378), involving the readfile() function (CVE-2007-3007), via the Session extension (CVE-2007-4652), via the MySQL extension (CVE-2007-3997) and in the dl() function which allows loading extensions outside of the specified directory (CVE-2007-4825). Multiple Denial of Service vulnerabilities were discovered, including a long 'library' parameter in the dl() function (CVE-2007-4887), in several iconv and xmlrpc functions (CVE-2007-4840 and CVE-2007-4783), in the setlocale() function (CVE-2007-4784), in the glob() and fnmatch() function (CVE-2007-4782 and CVE-2007-3806), a floating point exception in the wordwrap() function (CVE-2007-3998), a stack exhaustion via deeply nested arrays (CVE-2007-4670), an infinite loop caused by a specially crafted PNG image in the png_read_info() function of libpng (CVE-2007-2756) and several issues related to array conversion. Impact : Remote attackers might be able to exploit these issues in PHP applications making use of the affected functions, potentially resulting in the execution of arbitrary code, Denial of Service, execution of scripted contents in the context of the affected site, security bypass or information leak. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-11-14
    plugin id 26942
    published 2007-10-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=26942
    title GLSA-200710-02 : PHP: Multiple vulnerabilities
  • NASL family CGI abuses
    NASL id PHP_5_2_5.NASL
    description According to its banner, the version of PHP installed on the remote host is older than 5.2.5. Such versions may be affected by various issues, including but not limited to several buffer overflows.
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 28181
    published 2007-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=28181
    title PHP < 5.2.5 Multiple Vulnerabilities
refmap via4
bugtraq
  • 20070910 /* PHP <=5.2.4 open_basedir bypass & code exec & denial of service errata ... working on windows too .. */
  • 20070910 PHP <=5.2.4 open_basedir bypass & code exec & denial of service
  • 20070910 Re: PHP <=5.2.4 open_basedir bypass & code exec & denial of service
confirm
gentoo GLSA-200710-02
osvdb 45902
secunia
  • 27102
  • 28658
sreason 3119
suse SUSE-SA:2008:004
xf php-dl-security-bypass(36528)
statements via4
contributor Joshua Bressers
lastmodified 2007-09-12
organization Red Hat
statement We do not consider this to be a security issue. For more information please see http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169857#c1 and http://www.php.net/security-note.php
Last major update 05-02-2009 - 01:30
Published 11-09-2007 - 21:17
Last modified 15-10-2018 - 17:38
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