From: Karolin Seeger Date: Tue, 27 Oct 2020 11:32:54 +0000 (+0100) Subject: WHATSNEW: Add release notes for Samba 4.11.15. X-Git-Tag: samba-4.11.15~1 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=32ce2b3bc1ebaf5d43179180a3d1256b6643db5c;p=thirdparty%2Fsamba.git WHATSNEW: Add release notes for Samba 4.11.15. Signed-off-by: Karolin Seeger --- diff --git a/WHATSNEW.txt b/WHATSNEW.txt index a46f56c3bd9..8869edcdc87 100644 --- a/WHATSNEW.txt +++ b/WHATSNEW.txt @@ -1,3 +1,97 @@ + =============================== + Release Notes for Samba 4.11.15 + October 29, 2020 + =============================== + + +This is a security release in order to address the following defects: + +o CVE-2020-14318: Missing handle permissions check in SMB1/2/3 ChangeNotify. +o CVE-2020-14323: Unprivileged user can crash winbind. +o CVE-2020-14383: An authenticated user can crash the DCE/RPC DNS with easily + crafted records. + + +======= +Details +======= + +o CVE-2020-14318: + The SMB1/2/3 protocols have a concept of "ChangeNotify", where a client can + request file name notification on a directory handle when a condition such as + "new file creation" or "file size change" or "file timestamp update" occurs. + + A missing permissions check on a directory handle requesting ChangeNotify + meant that a client with a directory handle open only for + FILE_READ_ATTRIBUTES (minimal access rights) could be used to obtain change + notify replies from the server. These replies contain information that should + not be available to directory handles open for FILE_READ_ATTRIBUTE only. + +o CVE-2020-14323: + winbind in version 3.6 and later implements a request to translate multiple + Windows SIDs into names in one request. This was done for performance + reasons: The Microsoft RPC call domain controllers offer to do this + translation, so it was an obvious extension to also offer this batch + operation on the winbind unix domain stream socket that is available to local + processes on the Samba server. + + Due to improper input validation a hand-crafted packet can make winbind + perform a NULL pointer dereference and thus crash. + +o CVE-2020-14383: + Some DNS records (such as MX and NS records) usually contain data in the + additional section. Samba's dnsserver RPC pipe (which is an administrative + interface not used in the DNS server itself) made an error in handling the + case where there are no records present: instead of noticing the lack of + records, it dereferenced uninitialised memory, causing the RPC server to + crash. This RPC server, which also serves protocols other than dnsserver, + will be restarted after a short delay, but it is easy for an authenticated + non-admin attacker to crash it again as soon as it returns. The Samba DNS + server itself will continue to operate, but many RPC services will not. + +For more details, please refer to the security advisories. + + +Changes since 4.11.14 +--------------------- + +o Jeremy Allison + * BUG 14434: CVE-2020-14318: s3: smbd: Ensure change notifies can't get set + unless the directory handle is open for SEC_DIR_LIST. + +o Douglas Bagnall + * BUG 12795: CVE-2020-14383: Remote crash after adding NS or MX records using + 'samba-tool'. + * BUG 14472: CVE-2020-14383: Remote crash after adding MX records. + +o Volker Lendecke + * BUG 14436: CVE-2020-14323: winbind: Fix invalid lookupsids DoS. + + +####################################### +Reporting bugs & Development Discussion +####################################### + +Please discuss this release on the samba-technical mailing list or by +joining the #samba-technical IRC channel on irc.freenode.net. + +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 4.11.14 October 06, 2020 @@ -53,8 +147,7 @@ database (https://bugzilla.samba.org/). ====================================================================== -Release notes for older releases follow: ----------------------------------------- +---------------------------------------------------------------------- ===============================