D-Link DSL-2740B Authentication login.cgi access control

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CTI Interest Score
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9.6$0-$5k0.00

A vulnerability, which was classified as critical, was found in D-Link DSL-2740B (the affected version unknown). This affects an unknown code of the file login.cgi of the component Authentication. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The D-Link DSL-2740B Gateway with firmware EU_1.0, when an active administrator session exists, allows remote attackers to bypass authentication and gain administrator access via a request to login.cgi.

The weakness was released 03/01/2013 by Ivano Binetti as D-Link DSL-2740B (ADSL Router) Authentication Bypass as not defined posting (Website). It is possible to read the advisory at webapp-security.com. The vendor was not involved in the public release. This vulnerability is uniquely identified as CVE-2013-2271 since 02/25/2013. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

A public exploit has been developed by Ivano Binetti in HTTP Request and been published immediately after the advisory. It is declared as highly functional. The exploit is shared for download at exploit-db.com. We expect the 0-day to have been worth approximately $5k-$25k. By approaching the search of inurl:login.cgi it is possible to find vulnerable targets with Google Hacking. When an administrator in logged in the web management interface an attacker can bypass authentication by connecting to the url.

It is possible to mitigate the weakness by firewalling Web Server Port.

The vulnerability is also documented in the vulnerability database at Exploit-DB (24563). Entry connected to this vulnerability is available at 10296.

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VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2infoedit

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Ivano Binetti
Programming Language: 🔍
Download: 🔍
Google Hack: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

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Interest: 🔍
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Recommended: Firewall
Status: 🔍

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Firewalling: 🔍

Timelineinfoedit

02/25/2013 🔍
03/01/2013 +4 days 🔍
03/01/2013 +0 days 🔍
03/02/2013 +1 days 🔍
03/04/2013 +2 days 🔍
03/05/2013 +1 days 🔍
11/18/2013 +258 days 🔍
03/15/2019 +1943 days 🔍

Sourcesinfoedit

Vendor: https://www.dlink.com/

Advisory: D-Link DSL-2740B (ADSL Router) Authentication Bypass
Researcher: Ivano Binetti
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-2271 (🔍)
SecurityFocus: 58266 - D-Link DSL-2740B Routers Remote Authentication Bypass Vulnerability
OSVDB: 90822

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfoedit

Created: 03/05/2013 01:50 PM
Updated: 03/15/2019 09:29 AM
Changes: (15) vulnerability_cwe vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_cve_assigned source_cve_nvd_published source_cve_nvd_summary source_securityfocus source_securityfocus_date source_securityfocus_class source_securityfocus_title source_exploitdb_date
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