SUSE-SU-2018:3776-2: moderate: Security update for openssh

sle-security-updates at sle-security-updates at
Mon Apr 29 04:17:15 MDT 2019

   SUSE Security Update: Security update for openssh

Announcement ID:    SUSE-SU-2018:3776-2
Rating:             moderate
References:         #1091396 #1105010 #1106163 #964336 #982273 
Cross-References:   CVE-2018-15473 CVE-2018-15919
Affected Products:
                    SUSE Linux Enterprise Server for SAP 12-SP1

   An update that solves two vulnerabilities and has three
   fixes is now available.


   This update for openssh fixes the following issues:

   Following security issues have been fixed:

   - CVE-2018-15919: Remotely observable behaviour in auth-gss2.c in OpenSSH
     could be used by remote attackers to detect existence of users on a
     target system when GSS2 is in use. OpenSSH developers do not want to
     treat such a username enumeration (or "oracle") as a vulnerability.
   - CVE-2018-15473: OpenSSH was prone to a user existance oracle
     vulnerability due to not delaying bailout for an invalid authenticating
     user until after the packet containing the request has been fully
     parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

   Also the following security related hardening change was done:

   - Remove arcfour,cast,blowfish from list of default ciphers. (bsc#982273)

   And the following non-security issues were fixed:

   - Stop leaking File descriptors (bsc#964336)
   - sftp-client.c returns wrong error code upon failure (bsc#1091396)

Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Server for SAP 12-SP1:

      zypper in -t patch SUSE-SLE-SAP-12-SP1-2019-1081=1

Package List:

   - SUSE Linux Enterprise Server for SAP 12-SP1 (x86_64):



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