==========================================================================
Ubuntu Security Notice USN-4292-1
February 25, 2020
rsync vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS
– Ubuntu 16.04 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 incorrectly handled pointer arithmetic in zlib.
An attacker could use this issue to cause rsync to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2016-9840,
CVE-2016-9841)
It was discovered that rsync incorrectly handled vectors involving left shifts
of negative integers in zlib. An attacker could use this issue to cause rsync
to crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-9842)
It was discovered that rsync incorrectly handled vectors involving big-endian
CRC calculation in zlib. An attacker could use this issue to cause rsync to
crash, resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9843)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
rsync 3.1.2-2.1ubuntu1.1
Ubuntu 16.04 LTS:
rsync 3.1.1-3ubuntu1.3
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4292-1
CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843
Package Information:
https://launchpad.net/ubuntu/+source/rsync/3.1.2-2.1ubuntu1.1
https://launchpad.net/ubuntu/+source/rsync/3.1.1-3ubuntu1.3
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