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USN-4292-1: rsync vulnerabilities

25 February 2020

Several security issues were fixed in rsync.

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Releases

Packages

  • 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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 18.04
Ubuntu 16.04

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

Related notices

  • USN-4246-1: lib64z1, zlib, zlib1g, zlib1g-dev, zlib1g-udeb, libx32z1, lib32z1, lib32z1-dev, libx32z1-dev, lib64z1-dev
  • USN-6736-1: libklibc-dev, libklibc, klibc-utils, klibc
  • USN-6736-2: libklibc-dev, libklibc, klibc-utils, klibc