SUSE SLES11 Security Update : openssh (SUSE-SU-2018:3781-1)
Medium Nessus Plugin ID 119032
SynopsisThe remote SUSE host is missing one or more security updates.
DescriptionThis 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. (bsc#1105010)
Also the following security related hardening change was done: Removed arcfour,blowfish,cast from list of default ciphers as they are long discontinued and should no longer be used. (bsc#982273)
The update package also includes non-security fixes. See advisory for details.
Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionTo 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 11-SP4:zypper in -t patch slessp4-openssh-13867=1
SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch dbgsp4-openssh-13867=1