Vulnerability in Nbdkit Project
CVE-2021-3716
A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBD_OPT_STRUCTURED_REPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.
EPSS: 0.006 (44.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Nbdkit_project Nbdkit
- Redhat Enterprise_linux — versions 8.0
- N/a Nbdkit — versions Affects nbdkit v1.12 through v1.26.4 | Fixedin nbdkit v1.26.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Mailing List, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (x_refsource_MISC, Broken Link)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2021-3716?
- CVE-2021-3716 is a low-severity vulnerability in Nbdkit Project, classified under Improper Enforcement of Message Integrity During Transmission in a Communication Channel. CVSS score: 3.1/10. Published 2022-03-02.
- How severe is CVE-2021-3716?
- Low severity. CVSS v3 base score is 3.1 out of 10.
- Is CVE-2021-3716 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.