CVE-2019-25330 in SurfOffline Professional
Summary
by MITRE • 02/13/2026
SurfOffline Professional 2.2.0.103 contains a structured exception handler (SEH) overflow vulnerability that allows attackers to crash the application by manipulating the project name input. Attackers can generate a malicious payload of 382 'A' characters followed by specific byte sequences to trigger a denial of service condition and overwrite SEH registers.
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Analysis
by VulDB Data Team • 02/13/2026
The vulnerability identified as CVE-2019-25330 represents a critical structured exception handler overflow condition within SurfOffline Professional version 2.2.0.103. This flaw exists in the application's handling of project name inputs, where insufficient input validation allows malicious actors to manipulate the software's exception handling mechanism. The vulnerability specifically targets the structured exception handler chain which is fundamental to Windows application error recovery processes. When an attacker supplies a specially crafted input string containing 382 consecutive 'A' characters followed by carefully constructed byte sequences, the application fails to properly manage the exception handling process, leading to a controlled crash scenario. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, though it specifically manifests through the structured exception handling mechanism rather than traditional stack corruption.
The operational impact of this vulnerability extends beyond simple application instability, as it enables attackers to execute denial of service attacks against legitimate users of the SurfOffline Professional software. The specific payload construction demonstrates sophisticated understanding of Windows exception handling internals, where the 382 'A' characters likely fill existing stack space before the malicious byte sequences overwrite the structured exception handler registers. This manipulation allows attackers to redirect execution flow or cause the application to terminate unexpectedly, effectively preventing legitimate users from accessing the software's features. The vulnerability represents a significant risk to users who rely on SurfOffline Professional for offline web browsing and content management tasks, as the denial of service condition can be triggered through simple input manipulation without requiring elevated privileges or complex exploitation techniques.
Security professionals should recognize this vulnerability as part of the broader ATT&CK framework's technique T1499.1, which encompasses denial of service attacks targeting application stability. The vulnerability's exploitation requires minimal technical expertise, making it particularly dangerous in environments where users may inadvertently encounter malicious inputs or where the software is used in automated processes. Organizations should implement immediate mitigation strategies including input validation controls, application whitelisting, and regular software updates to address this vulnerability. The structured exception handler overflow represents a classic example of how seemingly minor input handling flaws can lead to significant operational disruptions, highlighting the importance of robust error handling and memory management practices in software development. Additionally, this vulnerability underscores the necessity of regular security assessments and penetration testing to identify similar weaknesses in legacy software applications that may not receive ongoing security updates from their vendors.