Vulnerability identifier: #VU46820

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25269

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
InspIRCd
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: InspIRCd

Description

The vulnerability allows a remote user to crash the daemon.

The vulnerability exists due to a use-after-free error within the pgsql module in InspIRCd. A remote user can send specially crafted request to the daemon, trigger a use-after-free error and crash the server..

Successful exploitation of the vulnerability requires that sqlauth or sqloper modules are used.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

InspIRCd: 2.0.0 - 3.5.0

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External links
http://docs.inspircd.org/security/2020-01/
http://github.com/inspircd/inspircd/compare/426d1c8...b3f1db9
http://github.com/inspircd/inspircd/compare/v2.0.28...07d7dea
http://www.debian.org/security/2020/dsa-4764

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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.