CVE-2019-25436 Overview
CVE-2019-25436 is a password change security bypass vulnerability in Sricam DeviceViewer 3.12.0.1. The flaw allows authenticated users to change account passwords without proper validation of the old password field. An attacker who injects a large payload into the old password parameter can bypass the validation check and set an arbitrary new password. The weakness maps to [CWE-303]: Incorrect Implementation of Authentication Algorithm. The issue requires local access and user interaction, limiting the attack surface but enabling account takeover where the application is in use.
Critical Impact
Authenticated attackers can overwrite the password of a target account by submitting an oversized old-password value, achieving full credential takeover within the DeviceViewer application.
Affected Products
- Sricam DeviceViewer 3.12.0.1
- Deployments using the affected DeviceViewer client for IP camera management
- Endpoints where DeviceViewer is installed alongside Sricam IP camera infrastructure
Discovery Timeline
- 2026-02-20 - CVE-2019-25436 published to NVD
- 2026-02-26 - Last updated in NVD database
Technical Details for CVE-2019-25436
Vulnerability Analysis
The vulnerability resides in the password change workflow of Sricam DeviceViewer 3.12.0.1. The application accepts an old password value, a new password value, and a confirmation field when a user initiates a credential change. The old password is intended to act as a knowledge-based authentication factor before the new password is committed. The validation logic, however, fails when the old password parameter contains an unusually large payload. Instead of rejecting the request or returning a validation error, the application proceeds to set the new password. The behavior maps to [CWE-303], where the authentication algorithm is implemented incorrectly rather than missing outright.
Root Cause
The root cause is improper handling of input length in the old password comparison routine. The validation path does not enforce strict equality between the supplied old password and the stored credential when the input exceeds expected boundaries. Oversized input causes the check to be skipped or short-circuited, allowing the change-password operation to complete without verifying knowledge of the original credential.
Attack Vector
Exploitation requires local access to a system running DeviceViewer and an authenticated session within the application. The attacker triggers the change-password feature, submits a large payload in the old password field, and supplies any chosen value as the new password. The application accepts the operation and persists the attacker-controlled password. Refer to the VulnCheck Advisory on Sricam and Exploit-DB #47476 for the original technical write-up.
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Stop Identity AttacksDetection Methods for CVE-2019-25436
Indicators of Compromise
- Unexpected password change events for DeviceViewer accounts without a prior failed authentication trail.
- Process activity from DeviceViewer.exe immediately followed by configuration or credential file modifications.
- User reports of being unable to log in to Sricam DeviceViewer due to credentials being silently changed.
Detection Strategies
- Monitor file integrity on DeviceViewer configuration and credential storage paths for unauthorized modifications.
- Inspect application logs (where available) for password change events that lack a corresponding successful old-password verification.
- Hunt for endpoints running the vulnerable version 3.12.0.1 by querying installed software inventories.
Monitoring Recommendations
- Alert on local user-initiated changes to DeviceViewer credential files outside of normal administrative windows.
- Track execution of DeviceViewer alongside subsequent network logins to Sricam IP cameras from the same host.
- Correlate endpoint telemetry with IP camera management plane access to identify post-compromise lateral movement.
How to Mitigate CVE-2019-25436
Immediate Actions Required
- Inventory all endpoints running Sricam DeviceViewer 3.12.0.1 and restrict local access to trusted users only.
- Rotate any credentials reused between DeviceViewer and other systems to contain potential cross-application abuse.
- Restrict interactive logon to shared workstations where DeviceViewer is installed.
Patch Information
No vendor advisory or fixed version is referenced in the NVD record for CVE-2019-25436. Consult the Sricam Official Website for the latest DeviceViewer release and confirm with the vendor whether a patched build is available before redeploying.
Workarounds
- Remove or disable Sricam DeviceViewer on systems where it is not strictly required for camera administration.
- Enforce operating system level access controls so that only administrators can launch DeviceViewer.
- Operate DeviceViewer from a dedicated, hardened management workstation with no other interactive users.
- Monitor for any local user creation or password change activity on hosts running the affected version.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
