Information disclosure in IBM AIX and VIOS



Published: 2018-07-03
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2018-0737
CWE ID CWE-200
Exploitation vector Local
Public exploit N/A
Vulnerable software
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IBM VIOS
Server applications / Application servers

IBM AIX
Operating systems & Components / Operating system

Vendor IBM Corporation

Security Advisory

This security advisory describes one low risk vulnerability.

1) Information disclosure

Risk: Low

CVSSv3: 2.9 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0737

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.

The weakness exists in the RSA key generation algorithm's BN_mod_inverse() and BN_mod_exp_mont() functions due to a cache timing side channel attack. A local attacker can recover the private key.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM VIOS: 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6

IBM AIX: 5.3, 6.1.0, 7.1, 7.2

CPE External links

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory27.asc

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.