Resource exhaustion in NetApp Hci Compute Node Firmware
CVE-2021-3733
There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.048 (91.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.047 · newest: 0.048 · change: +0.001
Affected products
- NetApp Hci Compute Node Firmware
- NetApp Management Services For Element Software And Hci
- NetApp Ontap Select Deploy Administration Utility
- NetApp Solidfire\, Enterprise Sds \& Hci Storage Node
- Python — versions 3.10.0
- Fedoraproject Extra Packages For Enterprise Linux — versions 7.0
- Fedoraproject Fedora — versions 33, 34, 35
- Red Hat Codeready Linux Builder — versions 8.0
- Red Hat Codeready Linux Builder For IBM Z Systems — versions 8.0
- Red Hat Codeready Linux Builder For Power Little Endian — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.python.org/issue43075 (Exploit, Patch, Issue Tracking, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- github.com/python/cpython/pull/24391 (Patch, Third Party Advisory)
- ubuntu.com/security/CVE-2021-3733 (Patch, Third Party Advisory)
- github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20220407-0001/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/05/msg00024.html (mailing-list)
- lists.debian.org/debian-lts-announce/2023/06/msg00039.html (mailing-list)
- af854a3a-2127-422b-91ae-364da2661108
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2021-3733?
- CVE-2021-3733 is a medium-severity vulnerability in NetApp Hci Compute Node Firmware, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2022-03-10.
- How severe is CVE-2021-3733?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-3733 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.