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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2024-3094
HistoryMar 29, 2024 - 5:15 p.m.

CVE-2024-3094

2024-03-2917:15:21
Debian Security Bug Tracker
security-tracker.debian.org
39
malicious code
tarballs
upstream
obfuscations
build process
source code
object file
functions
data interaction
unix

10 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

9.4 High

AI Score

Confidence

High

0.133 Low

EPSS

Percentile

95.6%

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.

10 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

9.4 High

AI Score

Confidence

High

0.133 Low

EPSS

Percentile

95.6%