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CVE-2016-6563

Status Candidate

Overview

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.

Related Files

Dlink DIR Routers Unauthenticated HNAP Login Stack Buffer Overflow
Posted Nov 21, 2016
Authored by Pedro Ribeiro | Site metasploit.com

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.

tags | exploit, overflow, shell, tcp, protocol
advisories | CVE-2016-6563
SHA-256 | f09dc3e03a56a9a9441af1cc6229aa3bd868aca364888ba73e07ec9a07559e11
D-Link DIR Routers HNAP Login Stack Buffer Overflow
Posted Nov 8, 2016
Authored by Pedro Ribeiro

A stack buffer overflow affects several D-Link routers and can be exploited by an unauthenticated attacker. The interesting thing about this vulnerability is that it affects both ARM and MIPS devices, so exploitation is slightly different for each type.

tags | advisory, overflow
advisories | CVE-2016-6563
SHA-256 | cb979ec54ab67f3c6ce43a8df2d9651d4f4b33a1511fd13e636ea603d7c292d6
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