Vulnerability identifier: #VU87917

Vulnerability risk: Critical

CVSSv3.1: 9.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:U/RC:C]

CVE-ID: CVE-2024-3094

CWE-ID: CWE-506

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
XZ Utils
Universal components / Libraries / Libraries used by multiple products

Vendor: tukaani.org

Description

The vulnerability allows a remote attacker to gain unauthorized access to the application.

The vulnerability exists due to presence of embedded malicious functionality in the application code (aka backdoor) that allows a remote attacker to gain unauthorized access to the system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

XZ Utils: 5.6.0 - 5.6.1

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External links
http://access.redhat.com/security/cve/CVE-2024-3094
http://bugzilla.redhat.com/show_bug.cgi?id=2272210
http://www.openwall.com/lists/oss-security/2024/03/29/4
http://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users
http://news.ycombinator.com/item?id=39865810
http://arstechnica.com/security/2024/03/backdoor-found-in-widely-used-linux-utility-breaks-encrypted-ssh-connections/
http://www.theregister.com/2024/03/29/malicious_backdoor_xz/
http://www.cisa.gov/news-events/alerts/2024/03/29/reported-supply-chain-compromise-affecting-xz-utils-data-compression-library-cve-2024-3094
http://www.darkreading.com/vulnerabilities-threats/are-you-affected-by-the-backdoor-in-xz-utils
http://aws.amazon.com/security/security-bulletins/AWS-2024-002/
http://www.tenable.com/blog/frequently-asked-questions-cve-2024-3094-supply-chain-backdoor-in-xz-utils
http://openssf.org/blog/2024/03/30/xz-backdoor-cve-2024-3094/
http://bugzilla.suse.com/show_bug.cgi?id=1222124
http://security.archlinux.org/CVE-2024-3094
http://security.alpinelinux.org/vuln/CVE-2024-3094
http://security-tracker.debian.org/tracker/CVE-2024-3094
http://lists.freebsd.org/archives/freebsd-security/2024-March/000248.html
http://news.ycombinator.com/item?id=39877267
http://gynvael.coldwind.pl/?lang=en&id=782

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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?

Yes. This vulnerability is being exploited in the wild.