Security Bulletin: Vulnerabilities in libuser affect Power Hardware Management Console (CVE-2015-3245 CVE-2015-3246)

Summary

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

Vulnerability Details

CVEID: CVE-2015-3245**
DESCRIPTION:** libuser is vulnerable to a denial of service, caused by the failure to properly filter out newline characters by the chfn() function within the userhelper utility. A local authenticated attacker could exploit this vulnerability to inject newline characters into the /etc/passwd file and cause a denial of service.
CVSS Base Score: 4.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/105022 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2015-3246**
DESCRIPTION:** libuser could allow a local authenticated attacker to gain elevated privileges on the system, caused by the improper handling of the /etc/passwd file. An attacker could exploit this vulnerability to gain root privileges on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/105023 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Power HMC V8.1.0.0
Power HMC V8.2.0.0
Power HMC V8.3.0.0

Remediation/Fixes

The following fixes are available on IBM Fix Central

Product

|

VRMF

|

APAR

|

Remediation/Fix

—|—|—|—

Power HMC

|

V8.8.1.0 SP2

|

MB03967

|

Apply eFix MH01572

Power HMC

|

V8.8.2.0 SP2

|

MB03968

|

Apply eFix MH01573

Power HMC

|

V8.8.3.0 SP1

|

MB03969

|

Apply eFix MH01574

Workarounds and Mitigations

None