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AUSCERT External Security Bulletin Redistribution
ESB-2017.1480
GnuTLS vulnerabilities
14 June 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libgnutls30
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-7869 CVE-2017-7507 CVE-2017-750
Original Bulletin:
http://www.ubuntu.com/usn/usn-3318-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running libgnutls30 check for an updated version of the software for
their operating system.
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Ubuntu Security Notice USN-3318-1
June 13, 2017
gnutls26, gnutls28 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.04
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in GnuTLS.
Software Description:
- - gnutls28: GNU TLS library
- - gnutls26: GNU TLS library
Details:
Hubert Kario discovered that GnuTLS incorrectly handled decoding a status
response TLS extension. A remote attacker could possibly use this issue to
cause GnuTLS to crash, resulting in a denial of service. This issue only
applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-7507)
It was discovered that GnuTLS incorrectly handled decoding certain OpenPGP
certificates. A remote attacker could use this issue to cause GnuTLS to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2017-7869)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
libgnutls30 3.5.6-4ubuntu4.1
Ubuntu 16.10:
libgnutls30 3.5.3-5ubuntu1.2
Ubuntu 16.04 LTS:
libgnutls30 3.4.10-4ubuntu1.3
Ubuntu 14.04 LTS:
libgnutls26 2.12.23-12ubuntu2.8
In general, a standard system update will make all the necessary changes.
References:
https://www.ubuntu.com/usn/usn-3318-1
CVE-2017-7507, CVE-2017-7869
Package Information:
https://launchpad.net/ubuntu/+source/gnutls28/3.5.6-4ubuntu4.1
https://launchpad.net/ubuntu/+source/gnutls28/3.5.3-5ubuntu1.2
https://launchpad.net/ubuntu/+source/gnutls28/3.4.10-4ubuntu1.3
https://launchpad.net/ubuntu/+source/gnutls26/2.12.23-12ubuntu2.8
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