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cve[email protected]CVE-2021-3716
HistoryMar 02, 2022 - 11:15 p.m.

CVE-2021-3716

2022-03-0223:15:09
CWE-924
web.nvd.nist.gov
221
cve-2021-3716
nbdkit
plaintext state
starttls
mitm
nbd_opt_structured_reply
system availability

3.1 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

3.7 Low

AI Score

Confidence

High

3.5 Low

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

42.8%

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.

Affected configurations

Vulners
NVD
Node
nbdkit_projectnbdkitRange1.121.26.4
OR
nbdkit_projectnbdkitRange1.26.5
VendorProductVersionCPE
nbdkit_projectnbdkit*cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*
nbdkit_projectnbdkit*cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*

CNA Affected

[
  {
    "product": "nbdkit",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Affects nbdkit v1.12 through v1.26.4 | Fixedin nbdkit v1.26.5"
      }
    ]
  }
]

3.1 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

3.7 Low

AI Score

Confidence

High

3.5 Low

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

42.8%