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Ubuntu Security Notice USN-4517-1

Ubuntu Security Notice USN-4517-1
Posted Sep 18, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4517-1 - It was discovered that Email-Address-List does not properly parse email addresses during email-ingestion. A remote attacker could use this issue to cause an algorithmic complexity attack, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2018-18898
MD5 | d9bf4f7b847a8dd904e675f42d425349

Ubuntu Security Notice USN-4517-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4517-1
September 17, 2020

libemail-address-list-perl vulnerability
==========================================================================

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Email-Address-List could be made to remotely exhaust resources if it
received specially crafted email data.

Software Description:
- libemail-address-list-perl: RFC close address list parsing

Details:

It was discovered that Email-Address-List does not properly parse email
addresses during email-ingestion. A remote attacker could use this issue
to cause an algorithmic complexity attack, resulting in a denial of
service. (CVE-2018-18898)

Update instructions:

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

Ubuntu 18.04 LTS:
libemail-address-list-perl 0.05-1+deb9u1build0.18.04.1

Ubuntu 16.04 LTS:
libemail-address-list-perl 0.05-1+deb9u1build0.16.04.1

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

References:
https://usn.ubuntu.com/4517-1
CVE-2018-18898

Package Information:

https://launchpad.net/ubuntu/+source/libemail-address-list-perl/0.05-1+deb9u1build0.18.04.1

https://launchpad.net/ubuntu/+source/libemail-address-list-perl/0.05-1+deb9u1build0.16.04.1

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