ID CVE-2012-4959
Summary Directory traversal vulnerability in NFRAgent.exe in Novell File Reporter 1.0.2 allows remote attackers to upload and execute files via a 130 /FSF/CMD request with a .. (dot dot) in a FILE element of an FSFUI record.
References
Vulnerable Configurations
  • Novell File Reporter (NFR) 1.0.2
    cpe:2.3:a:novell:file_reporter:1.0.2
CVSS
Base: 10.0 (as of 19-11-2012 - 14:24)
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
COMPLETE COMPLETE COMPLETE
exploit-db via4
  • description Novell File Reporter Agent XML Parsing Remote Code Execution Vulnerability (0day). CVE-2012-4957,CVE-2012-4958,CVE-2012-4959. Remote exploit for windows plat...
    id EDB-ID:23323
    last seen 2016-02-02
    modified 2012-12-12
    published 2012-12-12
    reporter Abysssec
    source https://www.exploit-db.com/download/23323/
    title Novell File Reporter Agent XML Parsing Remote Code Execution Vulnerability 0day
  • description NFR Agent FSFUI Record File Upload RCE. CVE-2012-4959. Remote exploit for windows platform
    id EDB-ID:22787
    last seen 2016-02-02
    modified 2012-11-19
    published 2012-11-19
    reporter metasploit
    source https://www.exploit-db.com/download/22787/
    title NFR Agent FSFUI Record File Upload RCE
metasploit via4
  • description This module exploits a heap overflow in NFRAgent.exe, a component of Novell File Reporter (NFR). The vulnerability occurs when handling requests of name "SRS", where NFRAgent.exe fails to generate a response in a secure way, copying user controlled data into a fixed-length buffer in the heap without bounds checking. This module has been tested against NFR Agent 1.0.4.3 (File Reporter 1.0.2).
    id MSF:AUXILIARY/DOS/HTTP/NOVELL_FILE_REPORTER_HEAP_BOF
    last seen 2018-10-08
    modified 2017-07-24
    published 2012-11-16
    reliability Normal
    reporter Rapid7
    source https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/http/novell_file_reporter_heap_bof.rb
    title NFR Agent Heap Overflow Vulnerability
  • description NFRAgent.exe, a component of Novell File Reporter (NFR), allows remote attackers to retrieve arbitrary text files via a directory traversal while handling requests to /FSF/CMD with an FSFUI record with UICMD 126. This module has been tested successfully against NFR Agent 1.0.4.3 (File Reporter 1.0.2) and NFR Agent 1.0.3.22 (File Reporter 1.0.1).
    id MSF:AUXILIARY/SCANNER/HTTP/NOVELL_FILE_REPORTER_FSFUI_FILEACCESS
    last seen 2019-02-20
    modified 2017-07-24
    published 2012-11-16
    reliability Normal
    reporter Rapid7
    source https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/novell_file_reporter_fsfui_fileaccess.rb
    title NFR Agent FSFUI Record Arbitrary Remote File Access
  • description NFRAgent.exe, a component of Novell File Reporter (NFR), allows remote attackers to retrieve arbitrary files via a request to /FSF/CMD with a SRS Record with OPERATION 4 and CMD 103, specifying a full pathname. This module has been tested successfully against NFR Agent 1.0.4.3 (File Reporter 1.0.2) and NFR Agent 1.0.3.22 (File Reporter 1.0.1).
    id MSF:AUXILIARY/SCANNER/HTTP/NOVELL_FILE_REPORTER_SRS_FILEACCESS
    last seen 2019-03-20
    modified 2019-03-05
    published 2012-11-16
    reliability Normal
    reporter Rapid7
    source https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/novell_file_reporter_srs_fileaccess.rb
    title NFR Agent SRS Record Arbitrary Remote File Access
  • description NFRAgent.exe, a component of Novell File Reporter (NFR), allows remote attackers to upload arbitrary files via a directory traversal while handling requests to /FSF/CMD with FSFUI records with UICMD 130. This module has been tested successfully against NFR Agent 1.0.4.3 (File Reporter 1.0.2) and NFR Agent 1.0.3.22 (File Reporter 1.0.1).
    id MSF:EXPLOIT/WINDOWS/NOVELL/FILE_REPORTER_FSFUI_UPLOAD
    last seen 2019-03-24
    modified 2017-07-24
    published 2012-11-16
    reliability Great
    reporter Rapid7
    source https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/novell/file_reporter_fsfui_upload.rb
    title NFR Agent FSFUI Record File Upload RCE
packetstorm via4
refmap via4
cert-vn VU#273371
misc https://community.rapid7.com/community/metasploit/blog/2012/11/16/nfr-agent-buffer-vulnerabilites-cve-2012-4959
saint via4
bid 56579
description Novell File Reporter FSFUI File Upload
osvdb 87573
title novell_file_reporter_fsfui_file_upload
type remote
Last major update 19-11-2012 - 14:24
Published 18-11-2012 - 14:55
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