A recent vulnerability has been discovered in tsMuxer v2.6.16, which is widely used for muxing and demuxing Transport Stream files. The vulnerability has been assigned the CVE number CVE-2022-43152 and is classified as a heap overflow vulnerability. In this post, we will delve into the details of this vulnerability and provide code snippets, original references, and exploit details. Let's dive right in!

The Vulnerability

CVE-2022-43152 occurs due to a heap overflow in the BitStreamWriter::flushBits() function, which is found at /tsMuxer/bitStream.h. Heap overflows are dangerous because they can lead to arbitrary code execution, which means a malicious attacker could execute their own code on a victim's system.

This specific heap overflow vulnerability is caused by improper handling of memory allocations in the BitStreamWriter::flushBits() function. The vulnerable code snippet is as follows:

inline void flushBits()
    if( m_bitPtr !=  )
        write(m_pBuffer, m_savedWord);
        m_savedWord = (uint64_t)U;
        m_bitPtr = (uint64_t)U;

Exploitation Details

To exploit CVE-2022-43152, an attacker would need to craft a malicious Transport Stream file that triggers the vulnerable code path. When an unsuspecting user processes the malicious file using tsMuxer v2.6.16, the heap overflow vulnerability can potentially be triggered, allowing the attacker to execute arbitrary code on the victim's system.

Although no proof-of-concept (PoC) exploit for this vulnerability is publicly available at this time, the presence of this vulnerability in a widely-used multimedia processing tool emphasizes the importance of keeping software up-to-date and applying necessary security patches.

1. Official CVE entry: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-43152
2. tsMuxer GitHub repository: https://github.com/justdan96/tsMuxer
3. Vulnerable code file on GitHub: https://github.com/justdan96/tsMuxer/blob/master/tsMuxer/bitStream.h

Mitigation and Patching

To protect yourself from potential exploitation of CVE-2022-43152, it is essential always to keep your software up-to-date, using the latest patches and security updates. As far as tsMuxer is concerned, keep an eye on the official tsMuxer GitHub repository (https://github.com/justdan96/tsMuxer) for any important announcements or updates on this vulnerability.

In summary, the CVE-2022-43152 vulnerability in tsMuxer v2.6.16 highlights the importance of practicing proper memory management and secure coding techniques. By understanding the nature of this heap overflow vulnerability and applying patches and updates as necessary, users can protect their systems against potential exploitation.


Published on: 10/31/2022 19:15:00 UTC
Last modified on: 11/02/2022 00:20:00 UTC