Overview
The vulnerability CVE-2025-32325 is a critical security flaw identified in the appendFrom function of Parcel.cpp. This vulnerability could potentially be exploited to perform an out of bounds write due to a heap buffer overflow, resulting in a local escalation of privilege. This vulnerability is especially concerning as it does not require additional execution privileges or user interaction to be exploited, posing a significant threat to any system running the vulnerable software.
Vulnerability Summary
CVE ID: CVE-2025-32325
Severity: High (7.8 CVSS)
Attack Vector: Local
Privileges Required: None
User Interaction: None
Impact: Privilege escalation, potential system compromise, and data leakage
Affected Products
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Product | Affected Versions
Parcel.cpp | All versions prior to patch
How the Exploit Works
The vulnerability resides in the appendFrom function of Parcel.cpp. When this function is invoked, it may lead to a heap buffer overflow due to insufficient bounds checking. This overflow can then be exploited to write data outside of the intended memory boundaries, potentially leading to a corruption of useful data, crashing of the system, or in worst cases, execution of arbitrary code leading to privilege escalation.
Conceptual Example Code
While the specific method to exploit this vulnerability would largely depend on the system and the environment in which Parcel.cpp is deployed, a conceptual example might look like this:
Parcel parcel;
byte* buffer = new byte[OVERFLOW_SIZE]; // OVERFLOW_SIZE is larger than the parcel buffer.
parcel.appendFrom(buffer, 0, OVERFLOW_SIZE); // This leads to a buffer overflow.In the above pseudocode, OVERFLOW_SIZE is a size larger than the buffer size of the ‘parcel’ object. This leads to an overflow when the ‘appendFrom’ function is called, causing a buffer overflow.
