Resource exhaustion in NetApp E-Series Performance Analyzer
CVE-2021-32640
ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the `Sec-Websocket-Protocol` header can be used to significantly slow down a ws server. The vulnerability has been fixed in ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the [`--max-http-header-size=size`](https://nodejs.org/api/cli.html#cli_max_http_header_size_size) and/or the [`maxHeaderSize`](https://nodejs.org/api/http.html#http_http_createserver_options_requestlistener) options.
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: 0.028 (86.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000
Affected products
- NetApp E-Series Performance Analyzer
- Websockets Ws — versions >= 5.0.0 <= 7.4.5
- Ws Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693 (Exploit, Patch, Third Party Advisory, Mitigation)
- github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff (Patch, Third Party Advisory)
- lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4… (mailing-list)
- security.netapp.com/advisory/ntap-20210706-0005/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-32640?
- CVE-2021-32640 is a medium-severity vulnerability in NetApp E-Series Performance Analyzer, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2021-05-25.
- How severe is CVE-2021-32640?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-32640 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.