Author: Ameeba

Overview

This report discusses the CVE-2025-54472 vulnerability, a severe flaw found in all versions of Apache bRPC before 1.14.1. This vulnerability allows attackers to cause a denial-of-service attack by crashing the service. It notably affects those using bRPC as a Redis server to provide network services to untrusted clients or using bRPC as a Redis client to call untrusted Redis services. The severity of this vulnerability underscores the need for immediate remediation.

Vulnerability Summary

CVE ID: CVE-2025-54472
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Apache bRPC | < 1.14.1 How the Exploit Works

The vulnerability lies within the bRPC Redis protocol parser code, which allocates memory for arrays or strings based on integers read from the network. If an unusually large integer is read, it may trigger a bad alloc error, leading to a program crash. An attacker can manipulate this weakness by sending specially crafted data packets to the bRPC service, instigating a denial-of-service attack. The 1.14.0 version attempted a fix by limiting memory allocation size, but due to an integer overflow in the limit checking code, this version remains vulnerable.

Conceptual Example Code

While this is not real code, it serves as a conceptual example of how the vulnerability might be exploited, by sending a large size value (e.g., 9999999999) as part of a Redis command:

POST /brpc/redis/command HTTP/1.1
Host: target.example.com
Content-Type: application/redis
*3\r\n$3\r\nSET\r\n$10\r\nmykey\r\n$9999999999\r\nmyvalue\r\n

The above example would cause the server to attempt to allocate an exorbitant amount of memory, leading to a crash.

Possible Mitigations

Two primary mitigation steps are recommended:
1. Upgrade Apache bRPC to version 1.14.1. This latest version includes a patch that addresses the vulnerability.
2. Alternatively, apply the patch manually as provided here: https://github.com/apache/brpc/pull/3050.
In either case, the patch limits the maximum length of memory allocated each time in the bRPC Redis parser to a default of 64MB. If your Redis request or response exceeds this size, you might encounter an error after the upgrade. Adjust the `redis_max_allocation_size` gflag to a larger limit if necessary.
As a temporary solution, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help prevent exploitation of this vulnerability.

Overview

The CVE-2025-55197 vulnerability refers to a critical flaw within the pypdf library, a popular open-source pure-python PDF library. This vulnerability could allow an attacker to craft a malicious PDF, ultimately leading to RAM exhaustion. Any system or application utilizing versions of the pypdf library prior to 6.0.0 are affected, posing high risks of system compromise and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-55197
Severity: High, CVSS score 7.5
Attack Vector: Malicious PDF file
Privileges Required: None
User Interaction: Required (needs to open or read the malicious PDF)
Impact: Potential system compromise and data leakage due to RAM exhaustion

Affected Products

Product | Affected Versions

pypdf | Prior to version 6.0.0

How the Exploit Works

The vulnerability resides in the handling of PDF files with a series of FlateDecode filters used on a malicious cross-reference stream. When the affected version of pypdf reads such a file, it can lead to RAM exhaustion, potentially causing system instability or crash. Other content streams are also affected when accessed explicitly.

Conceptual Example Code

Here is a pseudo-code example of how a malicious PDF might be crafted. This should not be used for malicious purposes.

# Creating a PDF with a series of FlateDecode filters
# (This is a conceptual example, not actual usable code.)
pdf = PDF()
xref_stream = XrefStream()
# Adding a series of FlateDecode filters
for i in range(1000000):
xref_stream.add_filter('FlateDecode')
# Adding the malicious xref stream to the PDF
pdf.add_xref_stream(xref_stream)
# Saving the malicious PDF
pdf.save('malicious.pdf')

Please note that this is a simplified pseudo-code to provide a basic understanding of the vulnerability. In real-world scenarios, the PDF would likely contain more complex structures and data.

Overview

The CVE-2025-43988 vulnerability is a critical security flaw found in KuWFi 5G01-X55 FL2020_V0.0.12 devices. It exposes an unauthenticated API endpoint, enabling remote attackers to retrieve critical configuration data, including the admin credentials. This vulnerability can result in a full system compromise or data leakage, posing a significant risk to both personal and organizational security.

Vulnerability Summary

CVE ID: CVE-2025-43988
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, Potential data leakage

Affected Products

Product | Affected Versions

KuWFi 5G01-X55 | FL2020_V0.0.12

How the Exploit Works

The vulnerability arises from an unauthenticated API endpoint (ajax_get.cgi) in the KuWFi 5G01-X55 FL2020_V0.0.12 devices. This endpoint does not require authentication, enabling remote attackers to send requests and retrieve sensitive configuration data, including admin credentials. Upon successful exploitation, the attacker gains access to the system, with the same privileges as the admin, leading to potential system compromise or data leakage.

Conceptual Example Code

An attacker could potentially exploit this vulnerability using an HTTP GET request to the exposed API endpoint. Here is a conceptual example:

GET /ajax_get.cgi HTTP/1.1
Host: vulnerable-device.com

This request, when sent, would return sensitive configuration data in the response, allowing the attacker to gain unauthorized access to the affected device.

Mitigation Guidance

To mitigate the risk posed by CVE-2025-43988, users are advised to apply the vendor’s patch as soon as it is available. In the interim, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation by monitoring and potentially blocking malicious IP addresses associated with this exploit.

Overview

This report details a significant security vulnerability identified as CVE-2025-8754, which affects the ABB Ability™ zenon software. This software vulnerability pertains to missing authentication for a critical function, which could lead to potential system compromise or data leakage. The widespread use of ABB Ability™ zenon from versions 7.50 to 14 underscores the urgency of addressing this issue.

Vulnerability Summary

CVE ID: CVE-2025-8754
Severity: High (7.5 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

ABB Ability™ zenon | 7.50 through 14

How the Exploit Works

Due to a missing authentication check on a critical function, an attacker can send specially crafted network requests to the affected systems. The system inadvertently processes these requests without validating the requester’s identity. This flaw could allow an attacker to manipulate system settings or exfiltrate sensitive data without the need for any user interaction or privileges.

Conceptual Example Code

A conceptual example of an exploit might involve sending a malicious JSON payload to a vulnerable endpoint. This could look something like the following:

POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "Exploit Code Here" }

This payload, if processed by the ABB Ability™ zenon endpoint, could enable unauthorized access to critical system functions or data.

Mitigation and Recommendations

Users of ABB Ability™ zenon versions 7.50 through 14 are advised to apply the vendor patch as soon as possible. If immediate patching is not feasible, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can act as a temporary mitigation measure. However, these solutions only reduce the risk of exploitation and do not eliminate the vulnerability. Therefore, applying the vendor patch remains the primary and most effective solution.

Overview

A significant vulnerability, CVE-2025-50617, has been identified in Netis WF2880 v2.1.40207. This vulnerability can be potentially exploited by attackers to crash the system and mount a Denial of Service (DoS) attack. Given the prevalent use of Netis WF2880, this issue is of considerable concern and needs immediate attention.

Vulnerability Summary

CVE ID: CVE-2025-50617
Severity: High (7.5 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Netis WF2880 | v2.1.40207

How the Exploit Works

The vulnerability lies in the FUN_0046ed68 function of the cgitest.cgi file in Netis WF2880. A buffer overflow can be triggered by controlling the ‘wps_set’ value in the payload, leading to a system crash. This crash can then be leveraged by attackers to execute a Denial of Service (DoS) attack, potentially leading to data leakage or full system compromise.

Conceptual Example Code

The following is a conceptual HTTP request that could be used to exploit this vulnerability:

POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "wps_set": "OVERFLOW VALUE" }

In the above code, ‘OVERFLOW VALUE’ would be replaced with a carefully crafted string that causes the buffer overflow, leading to system crash and potential further compromise.

Overview

The vulnerability, identified as CVE-2025-50616, affects the Netis WF2880 v2.1.40207 and is associated with a critical buffer overflow issue. This vulnerability can lead to a Denial of Service (DoS) attack if exploited, causing the affected system to crash. The flaw resides in the cgitest.cgi file and can impact various entities using this particular version of Netis. The severity of this vulnerability highlights the importance of immediate mitigation measures.

Vulnerability Summary

CVE ID: CVE-2025-50616
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Netis WF2880 | v2.1.40207

How the Exploit Works

The exploit takes advantage of a buffer overflow vulnerability in the FUN_0046f984 function of the cgitest.cgi file. Attackers can control the value of wl_advanced_set in the payload to cause an overflow. This overflow can make the program crash and lead to a Denial of Service (DoS) attack.

Conceptual Example Code

Given the nature of the vulnerability, an exploit might look like this:

POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"wl_advanced_set": "<Buffer overflow inducing value>"
}

In this example, the “Buffer overflow inducing value” would be a specially crafted string or sequence that would exceed the buffer capacity, causing the overflow and triggering the vulnerability.

Overview

This report discusses the critical buffer overflow vulnerability, CVE-2025-50615, discovered in Netis WF2880 v2.1.40207. This vulnerability is particularly worrisome due to its potential to lead to a Denial of Service (DoS) attack and compromise the system, posing a significant threat to system stability and data security.

Vulnerability Summary

CVE ID: CVE-2025-50615
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

Product | Affected Versions

Netis WF2880 | v2.1.40207

How the Exploit Works

The exploit takes advantage of a buffer overflow vulnerability in the FUN_00470c50 function of the cgitest.cgi file in Netis WF2880 v2.1.40207. By controlling the value of wl_mac_filter_set in the payload, the attackers can overload the buffer, causing the software to crash. This crash can trigger a Denial of Service attack, potentially compromising the system and leading to data leakage.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This represents a malicious HTTP POST request that could be used to trigger the vulnerability:

POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "wl_mac_filter_set": "malicious_payload" }

Mitigation Guidance

To mitigate this vulnerability, the recommended course of action is to apply the patch provided by the vendor as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation.

Overview

The following report details a significant buffer overflow vulnerability discovered in Netis WF2880 v2.1.40207. This vulnerability, assigned the ID CVE-2025-50614, has the potential to impact any organization or individual utilizing this version of the Netis WF2880. Its exploitation can lead to a system crash, enabling a Denial of Service (DoS) attack and potentially compromising system security or leading to data leakage.

Vulnerability Summary

CVE ID: CVE-2025-50614
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: No
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

Netis WF2880 | v2.1.40207

How the Exploit Works

The vulnerability resides in the FUN_0047151c function of the cgitest.cgi file. Attackers can exploit this vulnerability by sending a specially crafted payload that controls the value of the wds_set variable. This causes a buffer overflow, leading to a program crash. If maliciously executed, this could potentially enable a Denial of Service (DoS) attack, thereby compromising the system or leading to data leakage.

Conceptual Example Code

POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
wds_set=OVERFLOW_VALUE

In the above conceptual example, the “OVERFLOW_VALUE” represents a payload that would cause a buffer overflow in the system.

Mitigation Guidance

Users of the affected product are advised to apply the vendor patch as soon as it becomes available. Until then, the use of Web Application Firewall (WAF) or Intrusion Detection Systems (IDS) can provide temporary mitigation. Additionally, it’s recommended to regularly monitor system logs for any unusual activity that could indicate an attempt to exploit this vulnerability.

Overview

The vulnerability in discussion, CVE-2025-50613, affects the Netis WF2880 v2.1.40207. It’s a buffer overflow vulnerability that can allow attackers to cause a program crash, potentially leading to a Denial of Service (DoS) attack. This presents a significant risk to organizations relying on this software, as it could lead to system compromise and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-50613
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

Netis WF2880 | v2.1.40207

How the Exploit Works

The vulnerability resides in the FUN_00475e1c function of the cgitest.cgi file. Attackers can exploit this vulnerability by controlling the value of `wds_key_wep` in the payload. When an attacker sends an overly large value for `wds_key_wep`, it exceeds the buffer limit, causing a buffer overflow. This results in the program crashing, which can potentially lead to a Denial of Service (DoS) attack.

Conceptual Example Code

Here’s a conceptual example that demonstrates how the vulnerability might be exploited. This example assumes the attacker is sending a POST request with a large payload to the vulnerable endpoint.

POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
wds_key_wep=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...

In this example, the attacker sends a large amount of ‘A’ characters as the `wds_key_wep` value, triggering a buffer overflow and potentially causing a program crash or a DoS attack.
Please note that this is a conceptual example and may not represent an actual exploit scenario. It is intended for educational purposes only.

Overview

The vulnerability CVE-2025-50612 is a severe security flaw found in the Netis WF2880 v2.1.40207. It is a buffer overflow vulnerability located within the FUN_004743f8 function of the cgitest.cgi file. This vulnerability, if exploited, can lead to a Denial of Service (DoS) attack, potential system compromise, or even data leakage. The systems at risk are those utilizing the affected Netis device.

Vulnerability Summary

CVE ID: CVE-2025-50612
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Crash of the program, potential DoS attack, system compromise, and data leakage

Affected Products

Product | Affected Versions

Netis WF2880 | v2.1.40207

How the Exploit Works

An attacker can exploit this vulnerability by manipulating the value of ‘wl_sec_set’ in the payload of a network request. This action triggers a buffer overflow in the FUN_004743f8 function of the cgitest.cgi file. The overflow can cause the Netis WF2880 program to crash, potentially leading to a Denial of Service (DoS) attack or even a system compromise.

Conceptual Example Code

Below is a conceptual example of how this vulnerability may be exploited. This example represents a malicious HTTP POST request:

POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
wl_sec_set=AAAAA... [repeat A until buffer overflow]

In this example, ‘AAAAA…’ is the malicious payload that triggers the buffer overflow. The payload length would be crafted by the attacker to exceed the buffer’s capacity, causing the overflow. Please note that this is a simplified representation of the exploit, and actual exploit execution may require more complex steps.