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Critical severity · published Mar 29, 2024
CVE-2024-3094
Xz: malicious code in distributed source
10.0
CVSS
90.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)90.9% · higher than 100% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XZ
XZ · Tukaani
5.6.0; 5.6.1 · source: NVD
Affected product
XZ
XZ
Tukaani
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-3094
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-3094
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2024-3094
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2272210
Mailing List
https://www.openwall.com/lists/oss-security/2024/03/29/4
Vendor Advisory
https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users
www.openwall.com
http://www.openwall.com/lists/oss-security/2024/03/29/10
www.openwall.com
http://www.openwall.com/lists/oss-security/2024/03/29/12
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