ESB-2018.0278 - [UNIX/Linux][Ubuntu] libtasn1: Denial of service - Remote/unauthenticated 2018-01-29

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0278
                         Libtasn1 vulnerabilities
                              29 January 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           libtasn1
Publisher:         Ubuntu
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-6003 CVE-2017-10790 

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3547-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running libtasn1 check for an updated version of the software for 
         their operating system.

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Ubuntu Security Notice USN-3547-1
January 25, 2018

libtasn1-6 vulnerabilities

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

- - Ubuntu 17.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Libtasn1.

Software Description:
- - libtasn1-6: Library to manage ASN.1 structures

Details:

It was discovered that Libtasn1 incorrectly handled certain files.
If a user were tricked into opening a crafted file, an attacker could
possibly use this to cause a denial of service. This issue only
affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-10790)

It was discovered that Libtasn1 incorrectly handled certain inputs.
An attacker could possibly use this to cause Libtasn1 to hang,
resulting in a denial of service. This issue only affected Ubuntu 16.04
LTS and Ubuntu 17.10. (CVE-2018-6003)

Update instructions:

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

Ubuntu 17.10:
libtasn1-6	4.12-2.1ubuntu0.1

Ubuntu 16.04 LTS:
libtasn1-6	4.7-3ubuntu0.16.04.3

Ubuntu 14.04 LTS:
libtasn1-6	3.4-3ubuntu0.6

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

References:
https://www.ubuntu.com/usn/usn-3547-1
CVE-2017-10790, CVE-2018-6003

Package Information:
https://launchpad.net/ubuntu/+source/libtasn1-6/4.12-2.1ubuntu0.1
https://launchpad.net/ubuntu/+source/libtasn1-6/4.7-3ubuntu0.16.04.3
https://launchpad.net/ubuntu/+source/libtasn1-6/3.4-3ubuntu0.6

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