Resource exhaustion in Wire Wire-Server
CVE-2021-41119
Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of service for a heavily used server. The issue has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services. On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected. There are no known workarounds for this issue.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.014 (70.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.014 · change: +0.000
Affected products
- Wire Wire-Server
- Wireapp Wire-Server — versions < v2022-03-01
Weakness classification (CWE)
References
- github.com/wireapp/wire-server/security/advisories/GHSA-phxv-pffh-fq2r (Third Party Advisory)
- cs-syd.eu/posts/2021-09-11-json-vulnerability (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-41119?
- CVE-2021-41119 is a medium-severity vulnerability in Wire Wire-Server, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2022-04-13.
- How severe is CVE-2021-41119?
- Medium severity. CVSS v3 base score is 5.3 out of 10.