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CVE-2024-3094

Date: March 29, 2024

Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library.

Language: RUST

Severity Score

10.0

Related Resources (60)

Url: https://github.com/advisories/GHSA-rxwq-x6h5-x525

Url: https://ariadne.space/2024/04/02/the-xz-utils-backdoor-is-a-symptom-of-a-larger-problem/

Url: http://www.openwall.com/lists/oss-security/2024/03/29/4

Url: https://tukaani.org/xz-backdoor/

Url: http://www.openwall.com/lists/oss-security/2024/03/29/5

Url: https://news.ycombinator.com/item?id=39895344

Url: https://security.netapp.com/advisory/ntap-20240402-0001/

Url: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068024

Url: http://www.openwall.com/lists/oss-security/2024/03/29/8

Url: https://boehs.org/node/everything-i-know-about-the-xz-backdoor

Url: https://security.alpinelinux.org/vuln/CVE-2024-3094

Url: https://news.ycombinator.com/item?id=39865810

Url: https://blog.netbsd.org/tnf/entry/statement_on_backdoor_in_xz

Url: http://www.openwall.com/lists/oss-security/2024/03/30/12

Url: https://twitter.com/LetsDefendIO/status/1774804387417751958

Url: https://bugs.gentoo.org/928134

Url: http://www.openwall.com/lists/oss-security/2024/03/30/5

Url: https://www.openwall.com/lists/oss-security/2024/03/29/4

Url: https://www.vicarius.io/vsociety/vulnerabilities/cve-2024-3094

Url: https://lists.freebsd.org/archives/freebsd-security/2024-March/000248.html

Url: https://seclists.org/oss-sec/2024/q1/268

Url: https://bugzilla.suse.com/show_bug.cgi?id=1222124

Url: https://www.kali.org/blog/about-the-xz-backdoor/

Url: https://nvd.nist.gov/vuln/detail/CVE-2024-3094

Url: https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users

Url: https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/42405

Url: https://github.com/libarchive/libarchive/pull/1609

Url: https://github.com/tukaani-project/xz/commit/6e636819e8f070330d835fce46289a3ff72a7b89

Url: https://access.redhat.com/security/cve/CVE-2024-3094

Url: https://www.binarly.io/blog/persistent-risk-xz-utils-backdoor-still-lurking-in-docker-images

Url: https://gist.github.com/thesamesam/223949d5a074ebc3dce9ee78baad9e27

Url: https://gynvael.coldwind.pl/?lang=en&id=782

Url: https://twitter.com/debian/status/1774219194638409898

Url: https://twitter.com/infosecb/status/1774595540233167206

Url: https://twitter.com/infosecb/status/1774597228864139400

Url: https://lists.debian.org/debian-security-announce/2024/msg00057.html

Url: https://research.swtch.com/xz-timeline

Url: https://openssf.org/blog/2024/03/30/xz-backdoor-cve-2024-3094/

Url: http://www.openwall.com/lists/oss-security/2024/04/16/5

Url: http://www.openwall.com/lists/oss-security/2024/03/30/27

Url: https://www.cisa.gov/news-events/alerts/2024/03/29/reported-supply-chain-compromise-affecting-xz-utils-data-compression-library-cve-2024-3094

Url: https://github.com/karcherm/xz-malware

Url: https://security.archlinux.org/CVE-2024-3094

Url: https://arstechnica.com/security/2024/03/backdoor-found-in-widely-used-linux-utility-breaks-encrypted-ssh-connections/

Url: https://www.darkreading.com/vulnerabilities-threats/are-you-affected-by-the-backdoor-in-xz-utils

Url: https://ubuntu.com/security/CVE-2024-3094

Url: http://www.openwall.com/lists/oss-security/2024/03/30/36

Url: https://xeiaso.net/notes/2024/xz-vuln/

Url: https://research.swtch.com/xz-script

Url: http://www.openwall.com/lists/oss-security/2024/03/29/12

Url: https://bugzilla.redhat.com/show_bug.cgi?id=2272210

Url: https://www.tenable.com/blog/frequently-asked-questions-cve-2024-3094-supply-chain-backdoor-in-xz-utils

Url: https://www.theregister.com/2024/03/29/malicious_backdoor_xz/

Url: http://www.openwall.com/lists/oss-security/2024/03/29/10

Url: https://news.ycombinator.com/item?id=39877267

Url: https://security-tracker.debian.org/tracker/CVE-2024-3094

Url: https://aws.amazon.com/security/security-bulletins/AWS-2024-002/

Url: https://github.com/amlweems/xzbot

Url: https://lwn.net/Articles/967180/

Url: https://www.mend.io/vulnerability-database/CVE-2024-3094

Severity Score

10.0

Weakness Type (CWE)

Embedded Malicious Code

CWE-506

CVSS v3.1

Base Score:	10.0
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	CHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

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