TCP Dangerous Other

Port 3690 (SVN)

Learn about port 3690 (SVN) - security risks, vulnerabilities, and common uses. Find devices with port 3690 open.

Quick Info

Port Number

3690

Protocol

TCP

Service

SVN

IANA Name

SVN

Service Description

TCP port 3690 is the standard port for the Subversion (SVN) protocol, a centralized version control system. SVN allows developers to manage changes to files and directories over time, enabling collaboration and tracking of modifications. The protocol itself is a custom protocol built on top of TCP, designed for efficient data transfer and repository access. It involves a client-server architecture where clients request files or revisions from a central server. The server then provides the requested data, often using a binary delta encoding to minimize bandwidth usage. The protocol handles authentication, authorization, and transaction management to ensure data integrity and controlled access to the repository.

## Firewall Recommendations

If the SVN server is only accessed from within a trusted network, it's best to block port 3690 from external access on the firewall. If remote access is required, consider using a VPN to establish a secure tunnel between the client and the server, and then allow port 3690 only from the VPN's IP address range. Alternatively, if direct access is necessary, implement strong authentication mechanisms, regularly update the SVN server software to patch vulnerabilities, and consider using a reverse proxy with intrusion detection and prevention capabilities to protect against attacks. Employing rate limiting can mitigate brute-force attacks. Monitor logs for suspicious activity, such as repeated failed login attempts or unusual file access patterns.

Security Information

Exposing SVN servers directly to the internet without proper security measures can introduce significant risks. Common attack vectors include brute-force attacks on user credentials, particularly if weak passwords are used. Unauthenticated access to the repository (if misconfigured) allows attackers to steal sensitive source code and intellectual property. Server-side vulnerabilities in the SVN server software itself can be exploited to gain unauthorized access, execute arbitrary code, or perform denial-of-service attacks. The SVN repository can be targeted because it contains valuable information, including source code, configuration files, and sometimes even sensitive data that developers inadvertently commit. Attackers often seek to exploit vulnerabilities in the SVN server to gain access to this information, which can then be used for further malicious activities.

Known Vulnerabilities

CVE	Name	Severity	Description
CVE-2019-0221	Apache Subversion mod_dav_svn Crash	Medium	mod_dav_svn, как часть Apache Subversion, может быть уязвим к атаке DoS из-за некорректной обработки запросов.
CVE-2019-12384	Apache Subversion Information Disclosure	Low	Apache Subversion может раскрывать информацию о структуре репозитория при определенных условиях.
CVE-2017-9805	Apache Subversion Denial of Service	Medium	Apache Subversion может быть уязвим к атакам DoS из-за ошибок в обработке запросов.
CVE-2017-9789	Apache Subversion Memory Corruption	High	Apache Subversion может быть уязвим к повреждению памяти, что потенциально может привести к выполнению произвольного кода.
CVE-2017-7674	Apache Subversion Integer Overflow	Medium	Apache Subversion integer overflow может привести к DoS или другим неожиданным побочным эффектам.