CVE-2024-3094

Published Mar 29, 2024

Last updated 4 months ago

Overview

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: secalert@redhat.com
NVD status: Modified
Products: xz

Insights

Analysis from the Intruder Security Team

Published Oct 15, 2024

The attack is believed to be a nation-state level attack, and only the rogue developer and groups with which the compromised key has been shared would be able to gain access. As such, it is not likely to be widely exploited.

More information is available in our blog post here.

Risk scores

CVSS 3.1

Type: Primary
Base score: 10
Impact score: 6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Severity: CRITICAL

Weaknesses

secalert@redhat.com: CWE-506

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:tukaani:xz:5.6.0:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "73F1DAD7-F362-4C5B-B980-2E5313C369DA"
          },
          {
            "criteria": "cpe:2.3:a:tukaani:xz:5.6.1:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "55782A0B-B9C5-4536-A885-84CAB7029C09"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.