Audiograbber 1.83 Local Buffer Overflow Vulnerability (CVE-2018-25355)

Audiograbber version 1.83 is susceptible to a local buffer overflow vulnerability, identified as CVE-2018-25355. This flaw allows a local attacker to execute arbitrary code within the context of the application. The vulnerability stems from insufficient bounds checking when processing user-supplied input in the “Interpret” or “Album” fields. By crafting a malicious input string, an attacker can overwrite the Structured Exception Handling (SEH) pointers, redirecting program execution to attacker-controlled shellcode. This vulnerability poses a significant risk to systems where Audiograbber 1.83 is installed, as successful exploitation leads to arbitrary code execution with the privileges of the running application.

Attack Chain

1. The attacker prepares a malicious input string crafted to trigger a buffer overflow in Audiograbber.
2. The attacker launches Audiograbber version 1.83 on a vulnerable system.
3. The attacker interacts with Audiograbber and populates either the “Interpret” or “Album” field with the crafted malicious input.
4. Audiograbber processes the malicious input without proper bounds checking, leading to a buffer overflow.
5. The buffer overflow overwrites the Structured Exception Handling (SEH) record on the stack.
6. When an exception occurs (triggered intentionally or unintentionally by the overflow), the overwritten SEH handler is invoked.
7. The overwritten SEH handler redirects program execution to attacker-controlled shellcode.
8. The shellcode executes with the privileges of the Audiograbber application, potentially allowing for arbitrary code execution, privilege escalation, or data theft.

Impact

Successful exploitation of this vulnerability allows an attacker to execute arbitrary code on the targeted system with the privileges of the Audiograbber application. Due to the nature of the vulnerability, it requires local access to the system. However, the ability to execute code could lead to the installation of malware, data exfiltration, or further compromise of the system. The severity of the impact is rated as high with a CVSS v3.1 score of 8.4.

Recommendation

• Upgrade to a patched version of Audiograbber if one is available, or migrate to a different application if the vendor has not issued a patch.
• Deploy the Sigma rule “Detect Audiograbber Buffer Overflow via SEH Overwrite” to identify potential exploitation attempts by monitoring process creation events with suspicious SEH modifications.
• Implement input validation and sanitization measures for applications that process user-supplied data.
• Monitor process creation events for unexpected child processes spawned from Audiograbber.
• Consider using exploit mitigation techniques such as Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) to make exploitation more difficult.