CVE-2017-16548 : Security Advisory and Response

In rsync versions 3.1.2 and 3.1.3-development, a vulnerability exists in the receive_xattr function in xattrs.c, allowing remote attackers to cause a denial of service and potentially other impacts.

Understanding CVE-2017-16548

What is CVE-2017-16548?

The vulnerability in rsync versions 3.1.2 and 3.1.3-development stems from the lack of validation for a null-terminated character at the end of an xattr name, enabling malicious actors to exploit this oversight.

The Impact of CVE-2017-16548

The vulnerability can lead to a denial of service through heap-based buffer over-read and application crash. Other potential impacts may also occur, although they are unspecified.

Technical Details of CVE-2017-16548

Vulnerability Description

The receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing '\0' character in an xattr name, allowing for remote attacks.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions: 3.1.2 and 3.1.3-development

Exploitation Mechanism

Attackers can send manipulated data to the daemon, triggering a denial of service through heap-based buffer over-read and application crash.

Mitigation and Prevention

Immediate Steps to Take

Apply patches provided by the vendor promptly.
Monitor vendor advisories for updates and security alerts.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Implement network security measures to detect and prevent malicious activities.

Patching and Updates

Refer to vendor advisories for specific patching instructions and updates.