Description
xz is a compression and decompression library focusing on the xz format completely written in Go. The function readUvarint used to read the xz container format may not terminate a loop provide malicous input. The problem has been fixed in release v0.5.8. As a workaround users can limit the size of the compressed file input to a reasonable size for their use case. The standard library had recently the same issue and got the CVE-2020-16845 allocated.
References (2)
Core 2
Core References
Third Party Advisory x_refsource_confirm
https://github.com/ulikunitz/xz/security/advisories/GHSA-25xm-hr59-7c27
Patch, Third Party Advisory x_refsource_misc
https://github.com/ulikunitz/xz/commit/69c6093c7b2397b923acf82cb378f55ab2652b9b
Scores
CVSS v3
7.5
EPSS
0.0043
EPSS Percentile
62.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-835
Status
published
Products (2)
ulikunitz/xz
0 - 0.5.8Go
xz_project/xz
< 0.5.8
Published
Apr 28, 2021
Tracked Since
Feb 18, 2026