ID CVE-2016-6563
Summary Processing malformed SOAP messages when performing the HNAP Login action causes a buffer overflow in the stack in some D-Link DIR routers. The vulnerable XML fields within the SOAP body are: Action, Username, LoginPassword, and Captcha. The following products are affected: DIR-823, DIR-822, DIR-818L(W), DIR-895L, DIR-890L, DIR-885L, DIR-880L, DIR-868L, and DIR-850L.
Vulnerable Configurations
  • cpe:2.3:o:dlink:dir-823_firmware
  • cpe:2.3:h:dlink:dir-823
  • cpe:2.3:o:dlink:dir-822_firmware
  • cpe:2.3:h:dlink:dir-822
  • cpe:2.3:o:dlink:dir-818l%28w%29_firmware
  • cpe:2.3:h:dlink:dir-818l%28w%29
  • cpe:2.3:o:dlink:dir-895l_firmware
  • cpe:2.3:h:dlink:dir-895l
  • cpe:2.3:o:dlink:dir-890l_firmware
  • cpe:2.3:h:dlink:dir-890l
  • cpe:2.3:o:dlink:dir-885l_firmware
  • cpe:2.3:h:dlink:dir-885l
  • cpe:2.3:o:dlink:dir-880l_firmware
  • cpe:2.3:h:dlink:dir-880l
  • cpe:2.3:o:dlink:dir-868l_firmware
  • cpe:2.3:h:dlink:dir-868l
  • cpe:2.3:o:dlink:dir-850l_firmware
  • cpe:2.3:h:dlink:dir-850l
Base: 10.0
  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
exploit-db via4
description Dlink DIR Routers - Unauthenticated HNAP Login Stack Buffer Overflow (Metasploit). CVE-2016-6563. Remote exploit for Multiple platform. Tags: Metasploit Fram...
file exploits/multiple/remote/40805.rb
id EDB-ID:40805
last seen 2016-11-21
modified 2016-11-21
platform multiple
port 80
published 2016-11-21
reporter Exploit-DB
title Dlink DIR Routers - Unauthenticated HNAP Login Stack Buffer Overflow (Metasploit)
type remote
metasploit via4
description Several Dlink routers contain a pre-authentication stack buffer overflow vulnerability, which is exposed on the LAN interface on port 80. This vulnerability affects the HNAP SOAP protocol, which accepts arbitrarily long strings into certain XML parameters and then copies them into the stack. This exploit has been tested on the real devices DIR-818LW and 868L (rev. B), and it was tested using emulation on the DIR-822, 823, 880, 885, 890 and 895. Others might be affected, and this vulnerability is present in both MIPS and ARM devices. The MIPS devices are powered by Lextra RLX processors, which are crippled MIPS cores lacking a few load and store instructions. Because of this the payloads have to be sent unencoded, which can cause them to fail, although the bind shell seems to work well. For the ARM devices, the inline reverse tcp seems to work best. Check the reference links to see the vulnerable firmware versions.
last seen 2019-02-11
modified 2018-09-15
published 2016-11-07
reliability Excellent
reporter Rapid7
title Dlink DIR Routers Unauthenticated HNAP Login Stack Buffer Overflow
packetstorm via4
data source
last seen 2016-12-05
published 2016-11-21
reporter Pedro Ribeiro
title Dlink DIR Routers Unauthenticated HNAP Login Stack Buffer Overflow
refmap via4
bid 94130
cert-vn VU#677427
fulldisc 20161107 [CVE-2016-6563 / VU#677427]: Dlink DIR routers HNAP Login stack buffer overflow
Last major update 13-07-2018 - 16:29
Published 13-07-2018 - 16:29
Last modified 10-09-2018 - 12:08
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