CVE-2023-2650 : What You Need to Know

This CVE record outlines a vulnerability in OpenSSL that could lead to a Denial of Service (DoS) scenario due to the slow processing of specially crafted ASN.1 object identifiers. The impact of this vulnerability affects applications using certain OpenSSL subsystems and may result in notable to very long delays.

Understanding CVE-2023-2650

This section dives deeper into the details of CVE-2023-2650.

What is CVE-2023-2650?

The vulnerability revolves around the processing of specially crafted ASN.1 object identifiers within OpenSSL, potentially causing notable delays and leading to a Denial of Service situation.

The Impact of CVE-2023-2650

Applications utilizing OBJ_obj2txt() directly or various OpenSSL subsystems may experience significant delays when processing certain messages, which could result in a Denial of Service. The efficiency of the algorithmic complexity is a key factor in this vulnerability.

Technical Details of CVE-2023-2650

Let's explore some technical aspects of CVE-2023-2650.

Vulnerability Description

The issue stems from processing large sub-identifiers in the OBJECT IDENTIFIER, leading to a significant slowdown in translating these identifiers to decimal numbers. Applications that handle untrusted data using certain OpenSSL functions are vulnerable.

Affected Systems and Versions

OpenSSL versions 1.0.2, 1.1.1, 3.0.0, and 3.1.1 are impacted by this vulnerability, specifically when dealing with ASN.1 object identifiers or related data.

Exploitation Mechanism

The vulnerability can be exploited by crafting malicious ASN.1 object identifiers or data containing them, causing delays in processing and potentially triggering a DoS condition.

Mitigation and Prevention

In light of CVE-2023-2650, taking immediate steps to address and prevent potential exploits is crucial.

Immediate Steps to Take

It is recommended to update OpenSSL to the latest patched version to mitigate the risk of this vulnerability. Additionally, avoid processing untrusted data directly with vulnerable functions.

Long-Term Security Practices

Practicing good security hygiene, such as regular software updates, code reviews, and input validation, can help in preventing similar vulnerabilities in the future.

Patching and Updates

Ensure timely installation of security patches released by OpenSSL to address CVE-2023-2650 and other vulnerabilities, safeguarding the integrity of systems and applications.