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
9.6 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 |
---|---|---|---|---|---|
Alpine | edge-main | noarch | xz | <Β 5.6.1-r2 | UNKNOWN |
Alpine | 3.15-main | noarch | lighttpd | <Β 1.4.76-r0 | UNKNOWN |
Alpine | 3.16-main | noarch | lighttpd | <Β 1.4.76-r0 | UNKNOWN |
Alpine | 3.17-main | noarch | lighttpd | <Β 1.4.76-r0 | UNKNOWN |
Alpine | 3.18-main | noarch | lighttpd | <Β 1.4.76-r0 | UNKNOWN |
Alpine | 3.20-main | noarch | xz | <Β 5.6.1-r2 | UNKNOWN |
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
9.6 High
AI Score
Confidence
High
0.133 Low
EPSS
Percentile
95.6%