IBM VIOS update for bind

1) Reachable Assertion

EUVDB-ID: #VU45819

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-8622

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when handling TSIG-signed request. An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

IBM VIOS: 3.1.0 - 3.1.1

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_vios:3.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:ibm_vios:3.1.1:*:*:*:*:*:*:*

External links

https://aix.software.ibm.com/aix/efixes/security/bind_advisory18.asc

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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