CVE-2023-45676 Explained : Impact and Mitigation

This article provides detailed information about CVE-2023-45676, a multi-byte write heap buffer overflow vulnerability in stb_vorbis affecting versions <= 1.22.

Understanding CVE-2023-45676

CVE-2023-45676 is a high severity vulnerability with a CVSS base score of 7.3. It allows attackers to trigger an out-of-bounds write in stb_vorbis, potentially leading to code execution.

What is CVE-2023-45676?

stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. The vulnerability arises from an integer overflow in

setup_malloc

, which leads to a crafted file triggering an out-of-bounds write in

f->vendor[i] = get8_packet(f)

. The issue results from a large value in the

sz

variable overflowing with

sz+7

, bypassing memory buffer checks.

The Impact of CVE-2023-45676

Exploiting CVE-2023-45676 can have severe consequences as it allows unauthorized code execution. Attackers can potentially compromise systems running affected versions of stb_vorbis and manipulate the application's behavior.

Technical Details of CVE-2023-45676

This section covers specific technical details related to CVE-2023-45676, including the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

CVE-2023-45676 involves a multi-byte write heap buffer overflow in the

start_decoder

function in stb_vorbis library versions <= 1.22. The flaw can be triggered by processing a specially crafted ogg vorbis file.

Affected Systems and Versions

The vulnerability impacts stb_vorbis library versions less than or equal to 1.22. Systems using these versions are vulnerable to exploitation if not patched.

Exploitation Mechanism

Attackers can exploit CVE-2023-45676 by crafting malicious ogg vorbis files that trigger the out-of-bounds write in the vulnerable

start_decoder

function. Successful exploitation can lead to arbitrary code execution.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-45676, immediate actions should be taken to secure systems and prevent possible attacks.

Immediate Steps to Take

Immediately update stb_vorbis library to a patched version beyond 1.22 to eliminate the vulnerability. Organizations should also monitor for any suspicious activities or payloads targeting this exploit.

Long-Term Security Practices

Implementing secure coding practices, performing regular security audits, and staying informed about software vulnerabilities can help prevent similar issues in the future.

Patching and Updates

Regularly apply security patches and updates provided by the library maintainer to ensure that known vulnerabilities are addressed promptly.