Currently browsing: Security

Overview
Vulnerabilities have been identified in Siemens Gridscale X Prepay that allows unauthenticated username enumeration and enables an attacker to bypass account lock functionality. These issues may permit unauthorized access or prolonged access to protected resources, even after an account has been administratively locked.
Description
Siemens Gridscale X Prepay is a scalable energy management solution for utilities, integrating smart meters and customer payment options. The related vulnerabilities increase the risk of unauthorized actions, data exposure, or misuse of sensitive organizational resources.
CVE-2025-40806 Unauthenticated username enumeration. An attacker may determine the validity of usernames by a response code, allowing the attacker to determine whether a username is valid before authentication occurs. This exposure can facilitate targeted attacks by allowing an adversary to identify valid accounts before attempting further compromise.
CVE-2025-40807 Account lock bypass. An attacker can bypass the intended account lock protection by replaying or modifying previously captured valid responses. The issue appears related to session tokens that remain valid after logout or after an administrative account lock. Because these tokens do not expire immediately, an attacker with access to previously captured network responses can continue access the system despite the account being locked. This scenario is particularly concerning when the attacker is a former employee, insider, or anyone with prior authenticated access who may have retained network captured data or sessions artifacts.
Impact
The complete impact of this vulnerability is not yet known.
Solution
Siemens has released a new version of the Gridscale X Prepay and for version 4.2.1 and below, it is recommended to install the provided security update using the appropriates tools and procedures supplied with the product. Before deployment, all updates should be validated, and installed under the supervision of personnel with approved access within the target environment.
As a general security practice, Siemens also advises protecting network access with suitable controls such as firewalls, network segmentation, and VPNs. Systems should be configured in accordance with Siemens’ operational guidelines to ensure that the devices operate within a secure IT environment.
Acknowledgements
Thank you to the reporter, Kira The Raven Security. This document was written by Michael Bragg.

Overview
An unauthenticated HTTP request can enable telnet which may lead to remote code execution with root-level privileges.
Description
TOTOLINK manufactures routers and other networking equipment designed for small businesses and home implementations. The AX1800 routers are popular with users connecting multiple internet-capable devices.
The TOTOLINK AX1800 routers are missing authentication in /cgi-bin/cstecgi.cgi?action=telnet endpoint may result in arbitrary command execution at the administrative level. This vulnerability is being tracked by CVE-2025-13184.
Impact
The impact options include full access to configuration and filesystems. This level of access would provide an attacker the capability to modify routing DNS routing, intercept traffic, and achieve lateral movement across the local area network. There is a potential for wide area (WAN) network access if router management or telnet becomes externally reachable.
Solution
The CERT/CC is currently unaware of a practical solution to this problem. For complete remediation, a firmware update is necessary.
Mitigation Suggestions

Ensure the web management interface is not exposed to the WAN or any untrusted network. Restrict access to the administrative interface to trusted management hosts only.

Treat the X5000R router as untrusted from a security boundary point of view. Where possible, place it behind a separate firewall or router and avoid using it as the primary edge device.

Block or monitor unexpected traffic to telnet (TCP port 23) on the device. The sudden appearance of an open telnet service on the router is a strong indicator of exploitation.

Acknowledgements
Thanks to the reporter, HackingByDoing. This document was written by Laurie Tyzenhaus.

Overview
PCI Express Integrity and Data Encryption (PCIe IDE), introduced in the PCIe 6.0 standard, provides link-level encryption and integrity protection for data transferred across PCIe connections. Several issues were identified in the IDE specification that could allow an attacker with local access to influence data consumed on the link. The PCIe 6.0 IDE Erratum provides corrective guidance, and firmware and hardware updates are expected to address these concerns.
Description
IDE uses AES-GCM encryption to protect confidentiality, integrity, and replay resistance for traffic between PCIe components. It operates between the transaction layer and the data link layer, providing protection close to the hardware against unauthorized modification of link traffic.
Three specification-level vulnerabilities can, under certain conditions, result in consumption of stale or incorrect data if an attacker is able to craft specific traffic patterns at the PCIe interface:

CVE-2025-9612 – A missing integrity check on a receiving port may allow re-ordering of PCIe traffic, leading the receiver to process stale data.
CVE-2025-9613 – Incomplete flushing of a completion timeout may allow a receiver to accept incorrect data when an attacker injects a packet with a matching tag.
CVE-2025-9614 – Incomplete flushing or re-keying of an IDE stream may result in the receiver consuming stale incorrect data packets.

The PCI-SIG has issued a Draft Engineering Change Notice (D-ECN) titled “IDE TLP Reordering Enhancement” to the Base Specification Rev 7.0. The D-ECN feature will be included in upcoming PCI specifications (Base 6.5 and 7.1) and can also be used in current Base 5.x systems through standard compliance procedures. Hardware and firmware vendors that support PCIe 5.0 IDE should apply these corrections and incorporate the updated test procedures to ensure their implementations are compliant. Because IDE operates at the link layer, operating systems and applications may not detect these conditions directly. Timely firmware distribution through normal supply-chain channels is recommended.
Impact
An attacker with physical or low-level access to the PCIe IDE interface may be able to craft packets that cause the receiver to accept stale or corrupted data, affecting the integrity of the protected link.
Solution
Manufacturers should follow the updated PCIe 6.0 standard and apply the Erratum #1 guidance to their IDE implementations. End users should apply firmware updates provided by their system or component suppliers, especially in environments that rely on IDE to protect sensitive data.
Acknowledgements
These issues were reported by Arie Aharon, Makaram Raghunandan, Scott Constable, and Shalini Sharma to follow proper disclosure procedure. Coordination support was actively provided by Intel and PCI-SIG members. This document was prepared by Vijay Sarvepalli.

Overview
Duc, an open-source disk management tool, contains a stack-based buffer overflow vulnerability allowing for out-of-bounds memory read. An attacker can exploit this vulnerability through malformed input data, and can cause the tool to either crash or cause it to disclose portions of memory that should remain inaccessible. The vulnerability, tracked as CVE-2025-13654, has been patched in version 1.4.6 of Duc. In an enterprise situation, disk indexing tools that use Duc may be susceptible to crashes, data exposure, or other abnormal behavior if they process attacker-controlled input.
Description
Duc is an open-source disk management tool. It can be used to index, inspect and visualize disk usage. Duc is intended for Linux operating systems. The tool maintains a database of files it indexes, and can be used to query said files, or create graphs to detail where the files are.
A stack-based buffer overflow vulnerability has been discovered, tracked as CVE-2025-13654, within Duc. An attacker who can supply crafted input to the tool may trigger an out-of-bounds read, leading to a crash or unintended disclosure of adjacent stack data.
In the Duc software library, the code in buffer.c contains a function called buffer_get. Its length check uses unsigned subtraction, which can wrap on crafted input and result in memcpy() performing an out-of-bounds read.
Impact
An attacker able to send input data to a database or other input stream that uses Duc could cause a crash or information leak.
Solution
Version 1.4.6 of Duc, released on GitHub. Users should update to the latest version ASAP. All versions prior to 1.4.6 are considered to be affected.
Acknowledgements
Thanks to the reporter, HackingByDoing (hackingbydoing@proton.me). This document was written by Christopher Cullen.

Overview
nopCommerce, an ecommerce platform, fails to invalidate session cookies upon user logout or session termination, enabling attackers to use the captured cookie to gain access to the application. This vulnerability is extremely similar to CVE-2019-7215. The session cookie can be obtained through XSS, network interception, or a local compromise, and can then be re-used even after the user has logged out. Session hijack attacks have been widely observed for many years, and have been used in ransomware and cryptocurrency theft attacks. Malicious attackers are also known to sell this type of session data online after device compromise.
Description
nopCommerce is an open-source ecommerce platform. The platform is based on ASP.NET core and uses MS SQL 2012 as the backend. The platform is used by a variety of companies, including Microsoft, Volvo, and BMW. nopCommerce is intended for usage within various website stores, and works across shipping APIs, Content Delivery Networks (CDNs) and also offers a login feature for users to save their cart.
A vulnerability has been discovered within the login feature, as it does not invalidate session cookies following user logout or session termination. This vulnerability is tracked as CVE-2025-11699. The vulnerability description is as follows:

nopCommerce v4.70 and prior, and version 4.80.3, does not invalidate session cookies after logout or session termination, allowing an attacker who has a a valid session cookie access to privileged endpoints (such as /admin) even after the legitimate user has logged out, enabling session hijacking. Any version above 4.70 that is not 4.80.3 fixes the vulnerability.

Attackers have been known to exploit these types of vulnerabilities for numerous reasons. Session cookies and session ID information has been sold on underground forums post device compromise for other attackers to leverage in attacks, and have also been used in ransomware and cryptocurrency theft attacks.
Impact
The theft and re-use of a session cookie by an attacker could result in financial or ransomware attacks by an attacker.
Solution
Version 4.70 and after, with the exception of 4.80.3, fixes the vulnerability put forth by CVE-2025-11699. Users on version 4.80.3, or any version of nopCommerce prior to version 4.70, should update to the latest version, 4.90.3, as soon as possible.
Acknowledgements
Thanks to the reporter, Beatriz Fresno Naumova (beafn28).This document was written by Christopher Cullen.

Overview
The Forge JavaScript library provides TLS-related cryptographic utilities. A vulnerability that allows signature verification to be bypassed through crafted manipulation of ASN.1 structures, particularly in fields such as Message Authentication Code (MAC) data, was identified. Users of the node-forge package, and downstream consumers, are advised to update to the patched version in a timely manner.
Description
Forge (also available as the node-forge npm package) offers a range of cryptographic capabilities, including certificate generation, message signing and verification, and encryption and decryption. These functions depend on the ASN.1 parsing and validation routines of the library.
A flaw in the asn1.validate function was discovered that allows tampered ASN.1 data to pass validation even when cryptographically incorrect. By embedding custom options into certain ASN.1 fields that require recursive verification, an attacker can craft data that appears valid to the Forge verification routines. A proof-of-concept using manipulated PKCS#12 MAC data demonstrated how a forged payload could bypass signature verification.
The researcher who reported this issue has described the potential implications of the flaw as follows:

As a result, applications that rely on node-forge to enforce the structure and integrity of ASN.1-derived cryptographic protocols, including X.509 certificates, PKCS#7 messages, and PKCS#12 archives may be tricked into successfully validating malformed data.

While different environments will experience different levels of practical exposure, the underlying verification bypass is technically significant. The package is widely used, and a fix has been published. A patched release, version 1.3.2, is now available and includes updated test cases in tests/security/cve-2025-12816.js that illustrate the corrected behavior.
Impact
An attacker who can supply crafted ASN.1 data may cause applications relying on Forge for verification to accept forged or modified data as legitimate. This can enable authentication bypass, tampering with signed data, or misuse of certificate-related functions (e.g., cryptographically-signed software). In environments where cryptographic verification plays a central role in trust decisions, the potential impact can be significant.
Solution
Update to Forge version 1.3.2 or later. The fix is available in Pull Request #1124. Developers should integrate the updated version into their projects and distribute updates through their normal release channels.
Acknowledgements
Thanks to Hunter Wodzenski of Palo Alto Networks for responsibly reporting this issue. This document was written by Vijay Sarvepalli.

Overview
Fluent Bit is a logging and metrics processor and forwarder that is used in a variety of cloud and container networking environments. Several vulnerabilities in Fluent Bit have been discovered that could allow for authentication bypass, remote code execution (RCE) and denial of service (DoS) largely enabled by various Fluent Bit plugins and by how Fluent Bit processes tags. Many of these vulnerabilities require an attacker to have network access to a Fluent Bit instance. Fluent Bit has released version 4.0.12, 4.1.1 and 4.2.0 to remediate the vulnerabilities.
Description
Fluent Bit is a logging and metrics processor and forwarder, intended for usage in various cloud and container environments. It is commonly used to forward traffic to a Security Information and Event Management (SIEM) service, such as Splunk, for further analysis. Fluent Bit uses a tagging system to process and manage traffic that it moves. Multiple vulnerabilities have been discovered within Fluent Bit, largely facilitated by various plugins that manipulate or support tags.
Each individual vulnerability is listed below:
CVE-2025-12972
The Fluent Bit out_file plugin does not properly sanitize tag values when deriving output file names. When the File option is omitted, the plugin uses untrusted tag input to construct file paths. This allows attackers with network access to craft tags containing path traversal sequences that cause Fluent Bit to write files outside the intended output directory.
CVE-2025-12970
The extract_name() function in the Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary code execution.
CVE-2025-12969
The Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.
CVE-2025-12977
The Fluent Bit in_http, in_splunk, and in_elasticsearch input plugins fail to sanitize tag_key inputs. An attacker with network access or the ability to write records into Splunk or Elasticsearch can supply tag_key values containing special characters such as newlines or ../that are treated as valid tags. Because tags influence routing and some outputs derive filenames or contents from tags, this can allow newline injection, path traversal, forged record injection, or log misrouting, thus impacting data integrity and log routing.
CVE-2025-12978
Fluent Bit in_http, in_splunk, and in_elasticsearch input plugins contain a flaw in the tag_key validation logic that fails to enforce exact key-length matching. This allows crafted inputs where a tag prefix is incorrectly treated as a full match. A remote attacker with authenticated or exposed access to these input endpoints can exploit this behavior to manipulate tags and redirect records to unintended destinations. This compromises the authenticity of ingested logs and can allow injection of forged data, alert flooding and routing manipulation.
Impact
The vulnerabilities could be used for authentication bypass, RCE, DoS, and tag manipulation leading to improper function of Fluent Bit.
Solution
The vulnerabilities are all fixed in Fluent Bit version 4.0.12, 4.1.1 and 4.2.0. Users should download and install the latest version of Fluent Bit as soon as possible. The latest version of Fluent Bit is available at https://fluentbit.io/announcements/
Acknowledgements
Thanks to the reporter, Uri Katz of Oligo Security. This document was written by Christopher Cullen.