Detections
Analytics
OpenSSH 7.x < 7.4 Multiple Vulnerabilities
high Nessus Network Monitor Plugin ID 9855
Synopsis
The remote SSH server may be affected by multiple vulnerabilities.Description
The installed version of OpenSSH is 7.x prior to 7.4 and is affected by the following vulnerabilities :- A flaw exists in 'sshd(8)' that is triggered during the creation of forwarded Unix-domain sockets. This may allow a local attacker to potentially gain elevated privileges.
- A flaw exists in the 'realloc()' function in 'sshd(8)' that is triggered when reading keys. This may allow a local attacker to gain access to potentially sensitive key material that is leaked by the system.
- A flaw exists in 'ssh-agent(1)' that is triggered when invoking the PKCS#11 module during agent forwarding. This may allow a local attacker to potentially execute arbitrary code with elevated privileges.
- A flaw exists in 'sshd(8)' that is triggered as bounds are not properly checked in pre-authentication compression support, while the shared memory manager may be inappropriately accessed. This may potentially allow a local attacker to gain elevated privileges.
- A flaw exists in 'sshd(8)' that is triggered during the handling of a saturation of 'KEXINIT' messages. This may allow a remote attacker to cause a denial of service.
- A flaw exists in 'sshd(8)' that is triggered during as address ranges for 'AllowUser' and 'DenyUsers' directives are not properly validated at configuration load time. This may allow a local attacker to potentially gain unintended access to restricted areas.
- A flaw exists that allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an out-of-sequence NEWKEYS message, as demonstrated by Honggfuzz, related to kex.c and packet.c.
Solution
Upgrade to OpenSSH 7.x version 7.4 or later.See Also
Plugin Details
Severity: High
ID: 9855
Family: SSH
Published: 1/9/2017
Updated: 8/21/2019
Nessus ID: 96151
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Medium
Base Score: 6.9
Temporal Score: 6
Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS v3
Risk Factor: High
Base Score: 7.4
Temporal Score: 7.1
Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:X/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:openbsd:openssh
Patch Publication Date: 12/19/2016
Vulnerability Publication Date: 12/23/2016
Reference Information
CVE: CVE-2016-10009, CVE-2016-10010, CVE-2016-10011, CVE-2016-10012, CVE-2016-10708