ID

VAR-201708-0274

CVE

CVE-2014-7858

TITLE

D-Link DNR-326 Firmware authentication vulnerability

DESCRIPTION

The check_login function in D-Link DNR-326 before 2.10 build 03 allows remote attackers to bypass authentication and log in by setting the username cookie parameter to an arbitrary string. D-Link DNR-326 There are authentication vulnerabilities in the firmware.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. D-Link DNR-326 is a NAS network storage product from D-Link. D-Link DNR-326 has an authentication bypass vulnerability. An attacker could exploit the vulnerability to bypass the authentication mechanism and gain unauthorized access. D-Link DNR-326 is prone to an authentication-bypass vulnerability. This may aid in further attacks. D-Link DNR-326 Versions prior to 2.10 build 03 have a security vulnerability in the 'check_login' function. Overwiew -------- SEARCH-LAB performed an independent security assessment on four different D-Link devices. The assessment has identified altogether 53 unique vulnerabilities in the latest firmware (dated 30-07-2014). Several vulnerabilities can be abused by a remote attacker to execute arbitrary code and gain full control over the devices. We list below several of the problematic areas, where the most critical findings were discovered: - Authentication can be bypassed in several ways, allowing an attacker to take full control over the device without the need to exploit any programming or design bugs. - We found a few half-baked security workarounds to fix earlier vulnerabilities that introduced even more serious problems, leading to command injection and the possibility to take full control over the device. - Even though there were several security patches and workarounds in the session management part of the code, where we still found serious problems. It was still possible to perform unauthenticated file upload to an arbitrarily chosen location, which also lead to the possibility for an attacker to take full control over the device. - Default users (root, nobody) can be used during authentication, and the administrator cannot change the default (empty) password of these users from the user interface. Details and CVEs ---------------- For the specific details see our full report in [SL-ADV]. We suppose that some of the vulnerabilities were discovered by other researchers too, but we saw it reasonable and useful to publish our findings in such a comprehensive study. Naturally in the report we tried to find and reference all of the previous publications that may have found the same problems. We obtained the following CVE numbers for the above described vulnerabilities: - CVE-2014-7858: Check_login bypass vulnerability in DNR-326 - CVE-2014-7859: Buffer overflow in login_mgr.cgi and in file_sharing.cgi - CVE-2014-7860: Unauthenticated photo publish We also reported two other authentication bypass vulnerabilities (CVE-2014-7857) to D-Link; but since these problems have not been addressed correctly yet, we will only publish them after 22/06/2015. Affected devices ---------------- Main targeted devices during the assessment: - DNS-320, Revision A: 2.03, 13/05/2013 - DNS-320L, 1.03b04, 11/11/2013 - DNS-327L, 1.02, 02/07/2014 - DNR-326, 1.40b03, 7/19/2013 Other devices were influenced by one or more vulnerabilities: - DNS-320B, 1,02b01, 23/04/2014 - DNS-345, 1.03b06, 30/07/2014 - DNS-325, 1.05b03, 30/12/2013 - DNS-322L, 2.00b07 See [SL-ADV] for the complete vulnerability matrix at the time of the assessment. We note that other devices may also be vulnerable. Solution -------- Most of the vulnerabilities were fixed in: - DNS-320L 1.04.B12 - DNS-327L 1.03.B04 Some of the vulnerabilities were fixed in: - DNR-326 2.10.B03 - DNR-322L 2.10.B03 Besides installing the patches, where available, we highly recommend not to expose the web interface of the DNS and DNR devices to the internet. Since the devices use the UPnP feature, you should disable it in the router. Credits ------- These vulnerabilities were discovered and researched by Gergely Eberhardt (@ebux25) from SEARCH-LAB Ltd. (www.search-lab.hu) References ---------- [SL-ADV] Security Advisory, MULTIPLE VULNERABILITIES IN D-LINK DNS-320, 320L, 327L AND DNR-326 DEVICES, http://www.search-lab.hu/media/D-Link_Security_advisory_3_0_public.pdf [DNS-320] http://support.dlink.com/ProductInfo.aspx?m=DNS-320 [DNS-320L] http://support.dlink.com/ProductInfo.aspx?m=DNS-320L [DNS-327L] http://support.dlink.com/ProductInfo.aspx?m=DNS-327L [DNS-345] http://support.dlink.com/ProductInfo.aspx?m=DNS-345 [DNS-325] http://support.dlink.com/ProductInfo.aspx?m=DNS-325 [DNR-326] http://support.dlink.com/ProductInfo.aspx?m=DNR-326 [DNR-322L] http://support.dlink.com/ProductInfo.aspx?m=DNR-322L

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

authorization issue

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Search-Laboratory Ltd.

SOURCES

LAST UPDATE DATE

2024-11-23T22:07:18.003000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE