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IscCVE-2019-6477

HistoryNov 26, 2019 - 4:15 p.m.

CVE-2019-6477

2019-11-2616:15:13

CWE-400

isc

web.nvd.nist.gov

345

cve-2019-6477

tcp

pipelining

resource allocation

server load

nvd

intermittent unresponsiveness

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.4

Confidence

High

EPSS

0.017

Percentile

87.9%

JSON

With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem).

Affected configurations

Nvd

Node

iscbindRange9.11.7–9.11.12

iscbindRange9.14.1–9.14.7

iscbindRange9.15.0–9.15.5

iscbindMatch9.11.5s6supported_preview

iscbindMatch9.11.6p1

iscbindMatch9.11.6rc1

iscbindMatch9.11.12s1supported_preview

iscbindMatch9.12.4p1

iscbindMatch9.12.4p2

Node

fedoraprojectfedoraMatch30

fedoraprojectfedoraMatch31

VendorProductVersionCPE
iscbind9.11.5cpe:/a:isc:bind:9.11.5:s6:supported_preview:
iscbind9.12.4cpe:/a:isc:bind:9.12.4:p2::
iscbind9.11.12cpe:/a:isc:bind:9.11.12:s1:supported_preview:
iscbind9.12.4cpe:/a:isc:bind:9.12.4:p1::
iscbind9.11.6cpe:/a:isc:bind:9.11.6:rc1::
iscbind9.11.6cpe:/a:isc:bind:9.11.6:p1::
iscbindcpe:/a:isc:bind::::

Vendor	Product	Version	CPE
isc	bind	9.11.5	cpe:/a:isc:bind:9.11.5:s6:supported_preview:
isc	bind	9.12.4	cpe:/a:isc:bind:9.12.4:p2::
isc	bind	9.11.12	cpe:/a:isc:bind:9.11.12:s1:supported_preview:
isc	bind	9.12.4	cpe:/a:isc:bind:9.12.4:p1::
isc	bind	9.11.6	cpe:/a:isc:bind:9.11.6:rc1::
isc	bind	9.11.6	cpe:/a:isc:bind:9.11.6:p1::
isc	bind		cpe:/a:isc:bind::::

CNA Affected

[
  {
    "product": "BIND9",
    "vendor": "ISC",
    "versions": [
      {
        "status": "affected",
        "version": "9.11.6-P1 -> 9.11.12, 9.12.4-P1 -> 9.12.4-P2, 9.14.1 -> 9.14.7, and versions 9.11.5-S6 -> 9.11.12-S1 of BIND 9 Supported Preview Edition. Versions 9.15.0 -> 9.15.5 of the BIND 9.15 development branch are also affected"
      }
    ]
  }
]