CVE-2024-3094
Published: 29 March 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.
Notes
Author | Note |
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Priority reason: Results in a backdoor in sshd |
|
mdeslaur | The affected version of xz-utils was only in noble-proposed, and was removed before migrating to noble itself. No released versions of Ubuntu were affected by this issue. |
Priority
Severity score breakdown
Parameter | Value |
---|---|
Base score | 10.0 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Changed |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |