Vulnerability in Tukaani Xz
CVE-2020-22916
An issue discovered in XZ 5.2.5 allows attackers to cause a denial of service via decompression of a crafted file. NOTE: the vendor disputes the claims of "endless output" and "denial of service" because decompression of the 17,486 bytes always results in 114,881,179 bytes, which is often a reasonable size increase.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (15.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Tukaani Xz — versions 5.2.5
Public proof-of-concept exploits
References
- tukaani.org/xz/ (Product)
- github.com/snappyJack/CVE-request-XZ-5.2.5-has-denial-of-service-vulnerability (Broken Link)
- github.com/tukaani-project/xz/issues/61
- security-tracker.debian.org/tracker/CVE-2020-22916
- bugzilla.redhat.com/show_bug.cgi
- bugzilla.suse.com/show_bug.cgi
- web.archive.org/web/20230918084612/https://github.com/snappyJack/CVE-request-XZ…
Frequently asked questions
- What is CVE-2020-22916?
- CVE-2020-22916 is a medium-severity vulnerability in Tukaani Xz. CVSS score: 5.5/10. Published 2023-08-22.
- How severe is CVE-2020-22916?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-22916 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.