D-Link DIR-825 2.10b02 HTTP Request /vct_wan strchr memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9	$5k-$25k	0.00

Summaryinfo

A vulnerability was found in D-Link DIR-825 2.10b02 and classified as critical. This issue affects the function strchr of the file /vct_wan of the component HTTP Request Handler. The manipulation leads to memory corruption. The identification of this vulnerability is CVE-2021-29296. The attack may be initiated remotely. There is no exploit available. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability has been found in D-Link DIR-825 2.10b02 (Router Operating System) and classified as critical. This vulnerability affects the function strchr of the file /vct_wan of the component HTTP Request Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. CVE summarizes:

Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched

The weakness was shared 08/11/2021 as SAP10212. The advisory is shared for download at supportannouncement.us.dlink.com. This vulnerability was named CVE-2021-29296. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/05/2024).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Router Operating System

Vendor

D-Link

Name

DIR-825

Version

2.10b02

License

commercial

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/29/2021 🔍
08/11/2021 +135 days 🔍
08/11/2021 +0 days 🔍
06/05/2024 +1029 days 🔍

Sourcesinfo

Vendor: dlink.com

Advisory: SAP10212
Status: Confirmed

CVE: CVE-2021-29296 (🔍)
GCVE (CVE): GCVE-0-2021-29296
GCVE (VulDB): GCVE-100-180544

Entryinfo

Created: 08/11/2021 12:50 PM
Updated: 06/05/2024 01:24 PM
Changes: 08/11/2021 12:50 PM (40), 08/15/2021 04:00 PM (2), 06/05/2024 11:36 AM (33), 06/05/2024 01:24 PM (3)
Complete: 🔍
Cache ID: 18:5E1:40