Information disclosure in IBM AIX and VIOS
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-3639 |
| CWE-ID | CWE-362 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
IBM VIOS Server applications / Application servers IBM AIX Operating systems & Components / Operating system |
| Vendor | IBM Corporation |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Speculative Store Bypass
EUVDB-ID: #VU12911
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-3639
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The weakness exists due to race conditions in CPU cache processing. A local attacker can conduct a side-channel attack to exploit a flaw in the speculative execution of Load and Store instructions to read privileged memory.
Note: the vulnerability is referred to as "Spectre variant 4".
Install update from vendor's website.
Vulnerable software versionsIBM VIOS: 2.2.0 - 2.2.6
IBM AIX: 5.3 - 7.2
External linkshttp://aix.software.ibm.com/aix/efixes/security/variant4_advisory.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.
