2021-28846 | TRENDnet TEW-755AP/TEW-755AP2KAC/TEW-821DAP2KAC/TEW-825DAP POST Request apply_cgi fprintf format string
| 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. |
|---|---|---|
| 4.2 | $0-$5k | 0.57 |
A vulnerability was found in TRENDnet TEW-755AP, TEW-755AP2KAC, TEW-821DAP2KAC and TEW-825DAP 1.11B03. It has been classified as critical. This affects the function fprintf of the file apply_cgi of the component POST Request Handler. The manipulation with an unknown input leads to a format string vulnerability. CWE is classifying the issue as CWE-134. This is going to have an impact on availability. The summary by CVE is:
A Format String vulnerablity exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03, which could let a remote malicious user cause a denial of service due to a logic bug at address 0x40dcd0 when calling fprintf with “%s: key len = %d, too longn” format. The two variables seem to be put in the wrong order. The vulnerability could be triggered by sending the POST request to apply_cgi with a long and unknown key in the request body.
The weakness was disclosed 08/11/2021. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2021-28846 since 03/19/2021. The exploitability is told to be easy. It is possible to initiate the attack remotely. The successful exploitation requires a authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/15/2021).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
Vendor
Name
VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2
VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Format String
CWE: CWE-134
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
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Threat Intelligence
Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: no mitigation known
Status: 🔍
0-Day Time: 🔒
03/19/2021 CVE assigned
08/11/2021 Advisory disclosed
08/11/2021 VulDB entry created
08/15/2021 VulDB last updateAdvisory: github.com
Status: Not defined
CVE: CVE-2021-28846 (🔒)
Created: 08/11/2021 12:23
Updated: 08/15/2021 15:02
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍
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