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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | xz-utils | <Β 5.4.1-0.2 | xz-utils_5.4.1-0.2_all.deb |
Debian | 11 | all | xz-utils | <Β 5.2.5-2.1~deb11u1 | xz-utils_5.2.5-2.1~deb11u1_all.deb |
Debian | 10 | all | xz-utils | <Β 5.2.4-1+deb10u1 | xz-utils_5.2.4-1+deb10u1_all.deb |
Debian | 999 | all | xz-utils | <Β 5.6.1+really5.4.5-1 | xz-utils_5.6.1+really5.4.5-1_all.deb |
Debian | 13 | all | xz-utils | <Β 5.6.1+really5.4.5-1 | xz-utils_5.6.1+really5.4.5-1_all.deb |
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%