Ubuntu Security Update USN-3506-1: rsync vulnerabilities

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Ubuntu Security Notice USN-3506-1


7th December, 2017

rsync vulnerabilities


A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 17.10
• Ubuntu 17.04
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary


Several security issues were fixed in rsync.

Software description

• rsync - fast, versatile, remote (and local) file-copying tool

Details


It was discovered that rsync proceeds with certain file metadata updates
before checking for a filename. An attacker could use this to bypass access
restrictions. (CVE-2017-17433)

It was discovered that rsync does not check for fnamecmp filenames and also
does not apply the sanitize_paths protection mechanism to pathnames. An attacker
could use this to bypass access restrictions. (CVE-2017-17434)

Update instructions


The problem can be corrected by updating your system to the following package version:

Ubuntu 17.10:
rsync 3.1.2-2ubuntu0.1
Ubuntu 17.04:
rsync 3.1.2-1ubuntu0.1
Ubuntu 16.04 LTS:
rsync 3.1.1-3ubuntu1.1
Ubuntu 14.04 LTS:
rsync 3.1.0-2ubuntu0.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References


CVE-2017-17433, CVE-2017-17434

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