ID

VAR-201708-0275

CVE

CVE-2014-7859

TITLE

plural D-Link Buffer error vulnerability in product firmware

DESCRIPTION

Stack-based buffer overflow in login_mgr.cgi in D-Link firmware DNR-320L and DNS-320LW before 1.04b08, DNR-322L before 2.10 build 03, DNR-326 before 2.10 build 03, and DNS-327L before 1.04b01 allows remote attackers to execute arbitrary code by crafting malformed "Host" and "Referer" header values. plural D-Link The product firmware contains a buffer error vulnerability.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. D-link specializes in the design and development of wireless network and Ethernet road hardware products. A buffer overflow vulnerability exists in multiple D-Link products. Perform a boundary check before failing to copy the user-supplied data to a memory buffer of sufficient size. Allows an attacker to exploit a vulnerability to execute arbitrary code in the context of an application or to initiate a denial of service attack. Failed exploits may result in denial-of-service conditions. D-Link DNR-320L and others are network storage devices of D-Link. The following products and versions are affected: D-Link DNR-320L prior to 1.04b08; DNS-320LW prior to 1.04b08; DNR-322L prior to 2.10 build 03; DNR-326 prior to 2.10 build 03; Versions prior to 327L 1.04b01. 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). 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

buffer error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Search-Laboratory Ltd.

SOURCES

LAST UPDATE DATE

2024-11-23T22:07:18.046000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE