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samba4: security bump to version 4.5.7

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Fixes CVE-2017-2619:

   All versions of Samba prior to 4.6.1, 4.5.7, 4.4.11 are vulnerable to
   a malicious client using a symlink race to allow access to areas of
   the server file system not exported under the share definition.

   Samba uses the realpath() system call to ensure when a client requests
   access to a pathname that it is under the exported share path on the
   server file system.

   Clients that have write access to the exported part of the file system
   via SMB1 unix extensions or NFS to create symlinks can race the server
   by renaming a realpath() checked path and then creating a symlink. If
   the client wins the race it can cause the server to access the new
   symlink target after the exported share path check has been done. This
   new symlink target can point to anywhere on the server file system.

   This is a difficult race to win, but theoretically possible. Note that
   the proof of concept code supplied wins the race reliably only when
   the server is slowed down using the strace utility running on the
   server. Exploitation of this bug has not been seen in the wild.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Peter Korsgaard 2017-03-28 17:18:08 +02:00 committed by Thomas Petazzoni
parent c5fa9308ea
commit 493cedf3af
2 changed files with 2 additions and 2 deletions
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2
package/samba4/samba4.hash
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@ -1,2 +1,2 @@
# Locally calculated
sha256 bff02762b3e4ee030f02266c6e24a0b888248b387246219b7fbe3e1758ef2184 samba-4.5.5.tar.gz
sha256 ac70f09af80639d8189e1b9bc0a554841ee44df2b1ef58e7e682ad5400fd9400 samba-4.5.7.tar.gz

2
package/samba4/samba4.mk
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@ -4,7 +4,7 @@
#
################################################################################
SAMBA4_VERSION = 4.5.5
SAMBA4_VERSION = 4.5.7
SAMBA4_SITE = https://download.samba.org/pub/samba/stable
SAMBA4_SOURCE = samba-$(SAMBA4_VERSION).tar.gz
SAMBA4_INSTALL_STAGING = YES