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Date: Wed, 27 Mar 2019 14:35:01 -0700 (PDT)
From: Slackware Security Team <>
Subject: [slackware-security]  gnutls (SSA:2019-086-01)

Hash: SHA1

[slackware-security]  gnutls (SSA:2019-086-01)

New gnutls packages are available for Slackware 14.2 and -current to
fix security issues.

Here are the details from the Slackware 14.2 ChangeLog:
patches/packages/gnutls-3.6.7-i586-1_slack14.2.txz:  Upgraded.
  Fixes security issues:
  libgnutls, gnutls tools: Every gnutls_free() will automatically set
  the free'd pointer to NULL. This prevents possible use-after-free and
  double free issues. Use-after-free will be turned into NULL dereference.
  The counter-measure does not extend to applications using gnutls_free().
  libgnutls: Fixed a memory corruption (double free) vulnerability in the
  certificate verification API. Reported by Tavis Ormandy; addressed with
  the change above. [GNUTLS-SA-2019-03-27, #694]
  libgnutls: Fixed an invalid pointer access via malformed TLS1.3 async
  messages; Found using tlsfuzzer. [GNUTLS-SA-2019-03-27, #704]
  libgnutls: enforce key usage limitations on certificates more actively.
  Previously we would enforce it for TLS1.2 protocol, now we enforce it
  even when TLS1.3 is negotiated, or on client certificates as well. When
  an inappropriate for TLS1.3 certificate is seen on the credentials
  structure GnuTLS will disable TLS1.3 support for that session (#690).
  libgnutls: enforce the equality of the two signature parameters fields
  in a certificate. We were already enforcing the signature algorithm,
  but there was a bug in parameter checking code.
  (* Security fix *)

Where to find the new packages:

Thanks to the friendly folks at the OSU Open Source Lab
( for donating FTP and rsync hosting
to the Slackware project!  :-)

Also see the "Get Slack" section on for
additional mirror sites near you.

Updated package for Slackware 14.2:

Updated package for Slackware x86_64 14.2:

Updated package for Slackware -current:

Updated package for Slackware x86_64 -current:

MD5 signatures:

Slackware 14.2 package:
6ce564c9fb38e84bceffcca584613117  gnutls-3.6.7-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
ad660f430e5873b0cf3a5ac78a9ecf68  gnutls-3.6.7-x86_64-1_slack14.2.txz

Slackware -current package:
af0f6c0601209ba99d39679d1085a917  n/gnutls-3.6.7-i586-1.txz

Slackware x86_64 -current package:
dd2b15db16bcfefe213c8acf012e07c6  n/gnutls-3.6.7-x86_64-1.txz

Installation instructions:

Upgrade the package as root:
# upgradepkg gnutls-3.6.7-i586-1_slack14.2.txz


Slackware Linux Security Team

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