D-Link Router DI/DIR/TM alpha_auth_check User-Agent access control

CVSS Meta Temp Score
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CTI Interest Score
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9.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in D-Link Router DI/DIR/TM. Affected by this issue is the function alpha_auth_check. This manipulation with the input xmlset_roodkcableoj28840ybtide as part of User-Agent causes access control. This vulnerability appears as CVE-2013-6026. In addition, an exploit is available. This vulnerability is historically significant due to its background and the way it was received. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in D-Link Router DI/DIR/TM (Router Operating System). Affected by this vulnerability is the function alpha_auth_check. The manipulation with the input value xmlset_roodkcableoj28840ybtide leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The web interface on D-Link DIR-100, DIR-120, DI-624S, DI-524UP, DI-604S, DI-604UP, DI-604+, and TM-G5240 routers; Planex BRL-04R, BRL-04UR, and BRL-04CW routers; and Alpha Networks routers allows remote attackers to bypass authentication and modify settings via an xmlset_roodkcableoj28840ybtide User-Agent HTTP header, as exploited in the wild in October 2013.

The weakness was presented 10/12/2013 by Craig Heffner with Tactical Network Solutions as Reverse Engineering a D-Link Backdoor as not defined posting (Website). The advisory is shared at devttys0.com. The public release happened without involvement of D-Link. This vulnerability is known as CVE-2013-6026 since 10/04/2013. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/17/2024). MITRE ATT&CK project uses the attack technique T1068 for this issue. Due to its background and reception, this vulnerability has a historic impact. The advisory points out:

if your browser’s user agent string is “xmlset_roodkcableoj28840ybtide” (no quotes), you can access the web interface without any authentication and view/change the device settings

After immediately, there has been an exploit disclosed. It is possible to download the exploit at pastebin.com. It is declared as attacked. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 70447 (alpha_auth_check() Function Remote Authentication Bypass), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at securityadvisories.dlink.com. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (251), Tenable (70447), SecurityFocus (BID 62990†), OSVDB (98429†) and Secunia (SA55282†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • DI-604 103 BETA
  • DIR-100 1.13 (Rev.A)/5.0.0EUb3 Patch 2
  • TM-G5240 4.0.0b20 up to 4.0.0b29
  • Additionally, several Planex routers also appear to use the same firmware: BRL-04UR/BRL-04CW

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
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Nessus ID: 70447
Nessus Name: alpha_auth_check() Function Remote Authentication Bypass
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Upgrade: securityadvisories.dlink.com
ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

10/04/2013 🔍
10/12/2013 +8 days 🔍
10/12/2013 +0 days 🔍
10/12/2013 +0 days 🔍
10/15/2013 +3 days 🔍
10/16/2013 +1 days 🔍
10/19/2013 +3 days 🔍
10/21/2013 +2 days 🔍
10/25/2013 +4 days 🔍
12/02/2013 +38 days 🔍
08/17/2024 +3910 days 🔍

Sourcesinfo

Vendor: dlink.com

Advisory: Reverse Engineering a D-Link Backdoor
Researcher: Craig Heffner
Organization: Tactical Network Solutions
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-6026 (🔍)
GCVE (CVE): GCVE-0-2013-6026
GCVE (VulDB): GCVE-100-10693
CERT: 🔍
SecurityFocus: 62990
Secunia: 55282 - D-Link / Planex Multiple Products Authentication Bypass Security Issue, Less Critical
OSVDB: 98429
Vulnerability Center: 42021 - D-Link and Planex Routers firmware 1.13 Remote Security Bypass Vulnerability due to a Weak Authentication in alpha_auth_check(), Critical

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

Entryinfo

Created: 10/16/2013 10:09
Updated: 08/17/2024 01:03
Changes: 10/16/2013 10:09 (87), 05/14/2017 09:02 (1), 05/26/2021 18:11 (3), 07/13/2024 18:56 (21), 08/17/2024 01:03 (1)
Complete: 🔍
Committer: olku
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

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