CVE-2022-1886 Heap-based Buffer Overflow in GitHub repository vim/vim prior to 8.2.

CVE-2022-1886 Heap-based Buffer Overflow in GitHub repository vim/vim prior to 8.2.

In this type of attack, an attacker tricks a user into running a specially crafted script on the web server. The specially crafted script can then cause buffer overflow on the web server and execute arbitrary code on the server. In GitHub, we have a variety of ways to login to the application from our browser. We can login via GitHub.com, GitHub Enterprise, GitHub Pages, GitHub Mobile, GitHub Enterprise, GitHub Learning, GitHub Gists, GitHub Enterprise, GitHub Open Source, GitHub Enterprise, GitHub Pro, GitHub Enterprise, GitHub on the App Store, or via SSH. Once we login to GitHub, we can then create a new repository or fork an existing one. The next step depends on the type of application. For applications hosted on GitHub.com, we can edit the repository pages to add a “Get started” link that directs users to the documentation. For GitHub Enterprise, GitHub Pages, GitHub Mobile, GitHub Enterprise, GitHub Learning, GitHub Gists, GitHub Enterprise, GitHub Open Source, GitHub Enterprise, GitHub Pro, GitHub Enterprise, GitHub on the App Store, or GitHub SSH, we can add instructions in the README on how to access the repository. Next, we need to find a vulnerable script in the repository. In GitHub, all the repositories are public and can be viewed by anyone. GitHub provides a search feature that enables us to search the repository for any specific phrase or keyword. The next step is to craft a malicious URL to add to the search query. The URL

GitHub Enterprise

: How It Works & Security
GitHub Enterprise is a repository that helps organizations to manage large numbers of developers more effectively. It allows them to share code, build software faster, and collaborate more efficiently. GitHub Enterprise deploys on-premises or in the cloud and provides an interface for accessing private repositories securely via SSH or HTTPS.
There are also several different ways to login to GitHub Enterprise from our browser. We can login via GitHub Enterprise, GitHub Pages, GitHub Mobile, GitHub Enterprise, GitHub Learning, GitHub Gists, Github Enterprise, Github Pro or through SSH. Once we login into the application we can then create a new repository or fork an existing one. The next step varies depending on what type of application it is and the type of service you are trying to access within that application:

Remote Code Execution (RCE) attacks

In order to exploit this vulnerability, the attacker would need to be able to run code on the target machine. For example, they could create a web page and use it as a weaponized PDF file. The attack could also be carried out via email or any other method where files can be uploaded and executed remotely.
If you are using GitHub with your own website, then you should update your website's content with a warning message that informs users of this vulnerability. If you are using GitHub Enterprise or GitHub Pages, then you should provide similar instructions in your README file.

Detecting Buffer Overflow and Authorization Bypass

Buffer overflow is a computer security vulnerability that occurs when insufficient memory is allocated for data. Buffer overflow vulnerabilities are often exploited by attackers who use them to run arbitrary code on the target computer without authorization, or gain access to the target's private information. In GitHub, we have a variety of ways to login to the application from our browser. We can login via GitHub.com, GitHub Enterprise, GitHub Pages, GitHub Mobile, GitHub Enterprise, GitHub Learning, GitHub Gists, GitHub Enterprise, GitHub Open Source, GitHub Enterprise, GitHub Pro, Github Enterprise and SSH. Once we login to GitHub we can then create a new repository or fork an existing one. The next step depends on the type of application. For applications hosted on Github.com, we can edit the repository pages to add a “Get started” link that directs users to the documentation. For GitHub Enterprise, Github Pages and SSH we can add instructions in the README on how to access the repository. Next we need to find a vulnerable script in the repository. In Github all repositories are public and can be viewed by anyone so it is easy to find any vulnerable script in any repository by searching for it with keywords such as “script” or “javascript” in any language including Python 3 JRuby JavaScript PHP Perl Ruby Rust Scala and many more languages including proprietary platforms like .NET and Java

References

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