From 2513ed0fe296303f6ddde3ccef950a53cd802d83 Mon Sep 17 00:00:00 2001 From: Jule Anger Date: Mon, 10 Jan 2022 10:21:47 +0100 Subject: WHATSNEW: Add release notes for Samba 4.13.16. Signed-off-by: Jule Anger --- WHATSNEW.txt | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 70 insertions(+), 2 deletions(-) diff --git a/WHATSNEW.txt b/WHATSNEW.txt index 60b7c75f90b..b5699d7630e 100644 --- a/WHATSNEW.txt +++ b/WHATSNEW.txt @@ -1,3 +1,72 @@ + =============================== + Release Notes for Samba 4.13.16 + January 10, 2022 + =============================== + + +This is a security release in order to address the following defects: + +o CVE-2021-43566: mkdir race condition allows share escape in Samba 4.x. + https://www.samba.org/samba/security/CVE-2021-43566.html + + +======= +Details +======= + +o CVE-2021-43566: + All versions of Samba prior to 4.13.16 are vulnerable to a malicious + client using an SMB1 or NFS symlink race to allow a directory to be + created in an area of the server file system not exported under the + share definition. Note that SMB1 has to be enabled, or the share + also available via NFS in order for this attack to succeed. + + Clients that have write access to the exported part of the file system + under a share via SMB1 unix extensions or NFS can create symlinks that + can race the server by renaming an existing path and then replacing it + with a symlink. If the client wins the race it can cause the server to + create a directory under 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. The authenticated user must have + permissions to create a directory under the target directory of the + symlink. + + This is a difficult race to win, but theoretically possible. Note that + the proof of concept code supplied wins the race only when the server + is slowed down and put under heavy load. Exploitation of this bug has + not been seen in the wild. + + +Changes since 4.13.15 +--------------------- + +o Jeremy Allison + * BUG 13979: CVE-2021-43566: mkdir race condition allows share escape in Samba 4.x + + +####################################### +Reporting bugs & Development Discussion +####################################### + +Please discuss this release on the samba-technical mailing list or by +joining the #samba-technical IRC channel on irc.libera.chat or the +#samba-technical:matrix.org matrix channel. + +If you do report problems then please try to send high quality +feedback. If you don't provide vital information to help us track down +the problem then you will probably be ignored. All bug reports should +be filed under the Samba 4.1 and newer product in the project's Bugzilla +database (https://bugzilla.samba.org/). + + +====================================================================== +== Our Code, Our Bugs, Our Responsibility. +== The Samba Team +====================================================================== + + +Release notes for older releases follow: +---------------------------------------- =============================== Release Notes for Samba 4.13.15 December 15, 2021 @@ -70,8 +139,7 @@ database (https://bugzilla.samba.org/). ====================================================================== -Release notes for older releases follow: ----------------------------------------- +---------------------------------------------------------------------- =============================== Release Notes for Samba 4.13.14 November 9, 2021 -- cgit v1.2.1