Security Bulletin: Vulnerabilities in libssh library (CVE-2023-1667, CVE-2023-2283 ) affect Power HMC

Summary

The libssh library is used by Power Hardware Management Console (HMC). HMC has addressed the applicable CVEs.

Vulnerability Details

CVEID:CVE-2023-1667
**DESCRIPTION:**libssh is vulnerable to a denial of service, caused by a NULL pointer dereference during rekeying with algorithm guessing. A remote authenticated attacker could exploit this vulnerability to cause the daemon to crash.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/256622 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2023-2283
**DESCRIPTION:**libssh could allow a remote attacker to bypass security restrictions, caused by a memory allocation flaw in thepki_verify_data_signature function. By sending a specially crafted request, an attacker could exploit this vulnerability to bypass the authentication check of the connecting client.
CVSS Base score: 4.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/257617 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

Remediation/Fixes

The following fixes are available on IBM Fix Central at: <http://www-933.ibm.com/support/fixcentral/&gt;

Product

|

VRMF

|

APAR

|

Remediation/Fix

—|—|—|—

Power HMC

|

V10.1.1020.0 SP3 x86

|

MB04446

|

MF71681

Power HMC

|

V10.1.1020.0 SP3 ppc

|

MB04447

|

MF71682

Power HMC

|

V10.2.1040.0 SP2 x86

|

MB04448

|

MF71683

Power HMC

|

V10.2.1040.0 SP2 ppc

|

MB04449

|

MF71684

Power HMC

|

V10.3.1050.0 SP1 x86

|

MB04450

|

MF71685

Power HMC

|

V10.3.1050.0 SP1 ppc

|

MB04451

|

MF71686

Workarounds and Mitigations

None