Security restrictions bypass in IBM AIX

1) Improper input validation

EUVDB-ID: #VU9594

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-3737

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information on the target system.

The weakness exists due to an "error state mechanism" when SSL_read() or SSL_write() is called directly after SSL object. A remote attacker can a specially crafted input, trigger a fatal error during a handshake and return it in the initial function call to access or modify sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM AIX: 5.3 - 7.2

CPE2.3

• cpe:2.3:o:ibm_corporation:ibm_aix:5.3:*:*:*:*:*:*:*
• cpe:2.3:o:ibm_corporation:ibm_aix:6.1:*:*:*:*:*:*:*
• cpe:2.3:o:ibm_corporation:ibm_aix:7.1:*:*:*:*:*:*:*

External links

https://aix.software.ibm.com/aix/efixes/security/openssl_advisory25.asc

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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