| Name | CVE-2024-3094 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5649-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| xz-utils (PTS) | bullseye (security), bullseye | 5.2.5-2.1~deb11u1 | fixed |
| bookworm | 5.4.1-0.2 | fixed | |
| sid, trixie | 5.6.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| xz-utils | source | buster | (not affected) | |||
| xz-utils | source | bullseye | (not affected) | |||
| xz-utils | source | bookworm | (not affected) | |||
| xz-utils | source | (unstable) | 5.6.1+really5.4.5-1 |
[bookworm] - xz-utils <not-affected> (Vulnerable code not present)
[bullseye] - xz-utils <not-affected> (Vulnerable code not present)
[buster] - xz-utils <not-affected> (Vulnerable code not present)
https://www.openwall.com/lists/oss-security/2024/03/29/4
https://tukaani.org/xz-backdoor/
https://boehs.org/node/everything-i-know-about-the-xz-backdoor
https://rya.nc/xz-valid-n.html
https://lwn.net/Articles/967192/
https://securelist.com/xz-backdoor-story-part-1/112354/
https://securelist.com/xz-backdoor-story-part-2-social-engineering/112476/
https://securelist.com/xz-backdoor-part-3-hooking-ssh/113007/