SUSE SLED15 / SLES15 Security Update : openssh (SUSE-SU-2018:3686-1)

Medium Nessus Plugin ID 120162

Synopsis

The remote SUSE host is missing one or more security updates.

Description

This update for openssh fixes the following issues :

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.
(bsc#1106163)

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)

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.

Solution

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 Module for Server Applications 15:zypper in -t patch SUSE-SLE-Module-Server-Applications-15-2018-2619=1

SUSE Linux Enterprise Module for Open Buildservice Development Tools 15:zypper in -t patch SUSE-SLE-Module-Development-Tools-OBS-15-2018-2619=1

SUSE Linux Enterprise Module for Desktop Applications 15:zypper in -t patch SUSE-SLE-Module-Desktop-Applications-15-2018-2619=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-2619=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1081947

https://bugzilla.suse.com/show_bug.cgi?id=1091396

https://bugzilla.suse.com/show_bug.cgi?id=1105010

https://bugzilla.suse.com/show_bug.cgi?id=1106163

https://bugzilla.suse.com/show_bug.cgi?id=964336

https://www.suse.com/security/cve/CVE-2018-15473/

https://www.suse.com/security/cve/CVE-2018-15919/

http://www.nessus.org/u?3e302042

Plugin Details

Severity: Medium

ID: 120162

File Name: suse_SU-2018-3686-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2019/01/02

Updated: 2019/09/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSS v3.0

Base Score: 5.3

Temporal Score: 4.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:openssh, p-cpe:/a:novell:suse_linux:openssh-askpass-gnome, p-cpe:/a:novell:suse_linux:openssh-askpass-gnome-debuginfo, p-cpe:/a:novell:suse_linux:openssh-cavs, p-cpe:/a:novell:suse_linux:openssh-cavs-debuginfo, p-cpe:/a:novell:suse_linux:openssh-debuginfo, p-cpe:/a:novell:suse_linux:openssh-debugsource, p-cpe:/a:novell:suse_linux:openssh-fips, p-cpe:/a:novell:suse_linux:openssh-helpers, p-cpe:/a:novell:suse_linux:openssh-helpers-debuginfo, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/11/08

Vulnerability Publication Date: 2018/08/17

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2018-15473, CVE-2018-15919