Fedora 42 update for znc, znc-clientbuffer, znc-push



| Updated: 2024-11-22
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-39844
CWE-ID CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 Fedora
Operating systems & Components / Operating system

znc-push
Operating systems & Components / Operating system package or component

znc-clientbuffer
Operating systems & Components / Operating system package or component

znc
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Input validation error

EUVDB-ID: #VU97707

Risk: High

CVSSv4.0: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2024-39844

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote user to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input in modtcl  when processing the reason to kick a user from the channel. A remote user can pass specially crafted input to the application and execute arbitrary code on the server.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 42

znc-push: before 2.0.0-10.20210311git4243934.fc42

znc-clientbuffer: before 0-0.28.20190129git9766a4a.fc42

znc: before 1.9.1-4.fc42

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2024-3bede83c58


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. However, proof of concept for this vulnerability is available.



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