Security Bulletin: IBM Dynamic System Analysis (DSA) Preboot is affected by vulnerabilities in OpenSSH

Summary

IBM Dynamic System Analysis (DSA) Preboot has addressed the following vulnerabilities in OpenSSH.

Vulnerability Details

CVEID: CVE-2018-15919 DESCRIPTION: OpenSSH could allow a remote attacker to obtain sensitive information, caused by an error in auth-gss2.c when GSS2 is in use. By sending a specially crafted request, an attacker could exploit this vulnerability to enumerate valid usernames. Note: The discoverer has stated that the OpenSSH developers do not want to treat such a username enumeration as a vulnerability.
CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148952&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2018-15473 DESCRIPTION: OpenSSH could allow a remote attacker to obtain sensitive information, caused by different responses to valid and invalid authentication attempts. By sending a specially crafted request, an attacker could exploit this vulnerability to enumerate valid usernames.
CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/148397&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2017-15906 DESCRIPTION: OpenSSH is vulnerable to a denial of service, caused by an error in the process_open() function when in read-only mode. A remote authenticated attacker could exploit this vulnerability to create zero-length files and cause a denial of service.
CVSS Base Score: 6.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/133128&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2016-10708 DESCRIPTION: OpenSSH is vulnerable to a denial of service, caused by a NULL pointer dereference. By sending a specially crafted SSH2_MSG_NEWKEYS message, a remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/117448&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-10012 DESCRIPTION: OpenSSH could allow a local attacker to gain elevated privileges on the system, caused by improper bounds checking in the shared memory manager. An attacker could exploit this vulnerability to gain elevated privileges on the system.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/119831&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2008-1483 DESCRIPTION: OpenSSH could allow a local authenticated attacker to hijack forwarded X11 sessions, caused by an error in sshd when setting the DISPLAY environment variable. By listening to the same port used to forward the X11 session, a local attacker could obtain the MIT-MAGIC-COOKIE and hijack other user’'s sessions.
CVSS Base Score: 1.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/41438&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:L/AC:M/Au:S/C:N/I:P/A:N)

Affected Products and Versions

Product

|

Affected Version

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IBM Dynamic System Analysis (DSA) Preboot

|

9.6

Remediation/Fixes

Firmware fix versions are available on Fix Central: <http://www.ibm.com/support/fixcentral/&gt;

Product

|

Fix Version

—|—

IBM Dynamic System Analysis (DSA) Preboot
(ibm_fw_dsa_dsyte2z-9.65_anyos_32-64)

|

dsyte2z-9.65

Workarounds and Mitigations

None