CVE-2024-12925 Overview
CVE-2024-12925 is an improper certificate validation vulnerability in Akınsoft QR Menü that enables HTTP Response Splitting attacks. The flaw stems from the application failing to validate certificates against the expected host, mapped to [CWE-297]. Affected versions range from s1.05.05 before v1.05.12. Attackers can exploit this issue over the network without authentication or user interaction, leading to impacts on confidentiality, integrity, and availability of HTTP responses processed by the application.
Critical Impact
A network-based attacker can intercept TLS-protected traffic to QR Menü and inject malicious HTTP response content, enabling cache poisoning, session fixation, and cross-site scripting against downstream clients.
Affected Products
- Akınsoft QR Menü s1.05.05 through versions before v1.05.12
Discovery Timeline
- 2025-09-01 - CVE-2024-12925 published to NVD
- 2026-06-01 - Last updated in NVD database
Technical Details for CVE-2024-12925
Vulnerability Analysis
The vulnerability combines two distinct weaknesses. First, Akınsoft QR Menü performs Transport Layer Security (TLS) connections without correctly verifying that the certificate presented by the server matches the requested hostname. Second, the application processes HTTP headers in a way that permits attacker-controlled carriage return and line feed (CRLF) characters to be injected into responses.
An attacker positioned on the network path can present a valid certificate for a different host and have it accepted by the client. Once the TLS channel is subverted, the attacker manipulates header data flowing through the application to perform HTTP Response Splitting. This combination undermines the trust assumptions of HTTPS and enables response manipulation against any user of the affected QR menu service.
Root Cause
The root cause is improper validation of X.509 certificates against the expected host name during TLS handshake, classified under [CWE-297]. The certificate chain may be cryptographically valid, but the Subject Alternative Name or Common Name is not enforced against the host the client intended to reach. This allows any certificate trusted by the client to satisfy validation regardless of hostname.
Attack Vector
Exploitation requires network-adjacent positioning between the QR Menü client and the legitimate server, such as on shared Wi-Fi or compromised network infrastructure. The attacker presents a substitute certificate, then injects CRLF sequences into HTTP header fields. The split response can introduce a second attacker-controlled HTTP message that downstream proxies, caches, or browsers process as legitimate. Refer to the USOM Notification TR-25-0202 and the Siber Güvenlik Notification TR-25-0202 for vendor coordination details.
Detection Methods for CVE-2024-12925
Indicators of Compromise
- HTTP responses from QR Menü endpoints containing unexpected CR (%0D) or LF (%0A) sequences in header fields
- TLS sessions to QR Menü servers presenting certificates whose Subject Alternative Name does not match the intended hostname
- Duplicate or unexpected Set-Cookie, Location, or Content-Length headers in captured traffic
Detection Strategies
- Inspect proxy and web application firewall logs for header values containing encoded line terminators directed at QR Menü services
- Compare certificate fingerprints observed by clients against the known-good fingerprints of the legitimate QR Menü endpoints
- Apply network traffic analysis to identify TLS handshakes where the SNI does not align with the certificate Common Name
Monitoring Recommendations
- Forward TLS metadata and HTTP transaction logs to a centralized analytics platform for correlation
- Alert on responses containing more than one HTTP status line in a single transaction
- Track outbound connections from QR Menü installations to unexpected IP addresses or autonomous systems
How to Mitigate CVE-2024-12925
Immediate Actions Required
- Upgrade Akınsoft QR Menü to version v1.05.12 or later, which addresses the certificate validation defect
- Inventory all deployments running versions between s1.05.05 and v1.05.12 and prioritize public-facing instances
- Rotate any session cookies or credentials that may have been transmitted through vulnerable installations
Patch Information
The vendor addressed the issue starting in QR Menü v1.05.12. Coordination details are published through Turkey's national CERT in USOM Notification TR-25-0202 and the corresponding Siber Güvenlik advisory. Operators should validate the installed build after upgrading and confirm that TLS connections fail when presented with a hostname-mismatched certificate.
Workarounds
- Restrict QR Menü clients to trusted networks until the patched version is deployed
- Terminate TLS at a reverse proxy that performs strict hostname verification and strips CRLF characters from forwarded headers
- Pin the expected server certificate or its issuer at the network perimeter to detect substitution attempts
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
