IBM VIOS update for bind



Published: 2021-07-30
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-25215
CWE-ID CWE-617
Exploitation vector Network
Public exploit N/A
Vulnerable software
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IBM VIOS
Server applications / Application servers

Vendor IBM Corporation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Reachable Assertion

EUVDB-ID: #VU52736

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-25215

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 processing DNAME records. A remote attacker can force named to add the same RRset to the ANSWER section more than once, trigger an assertion failure and crash the service. Both authoritative and recursive servers are affected by this issue during zone transfers.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM VIOS: 3.1.0 - 3.1.2

External links

http://aix.software.ibm.com/aix/efixes/security/bind_advisory19.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.



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