Vulnerability in Ulikunitz Xz
CVE-2021-29482
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.014 (72.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Ulikunitz Xz — versions < 0.5.8
- Xz Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/ulikunitz/xz/security/advisories/GHSA-25xm-hr59-7c27 (Third Party Advisory)
- github.com/ulikunitz/xz/commit/69c6093c7b2397b923acf82cb378f55ab2652b9b (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29482?
- CVE-2021-29482 is a high-severity vulnerability in Ulikunitz Xz, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2021-04-28.
- How severe is CVE-2021-29482?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-29482 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.