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ubuntucveUbuntu.comUB:CVE-2021-25214
HistoryApr 28, 2021 - 12:00 a.m.

CVE-2021-25214

2021-04-2800:00:00
ubuntu.com
ubuntu.com
17
bind 9.8.5
denial of service
malformed ixfr

CVSS2

4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.009

Percentile

83.0%

JSON

In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 9.11.29, 9.12.0 -> 9.16.13, and versions
BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND 9 Supported
Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND
9.17 development branch, when a vulnerable version of named receives a
malformed IXFR triggering the flaw described above, the named process will
terminate due to a failed assertion the next time the transferred secondary
zone is refreshed.

Notes

Author Note
mdeslaur affects 9.8.5+
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchbind9< 1:9.11.3+dfsg-1ubuntu1.15UNKNOWN
ubuntu20.04noarchbind9< 1:9.16.1-0ubuntu2.8UNKNOWN
ubuntu20.10noarchbind9< 1:9.16.6-3ubuntu1.2UNKNOWN
ubuntu21.04noarchbind9< 1:9.16.8-1ubuntu3.1UNKNOWN
ubuntu21.10noarchbind9< 1:9.16.8-1ubuntu3.1UNKNOWN
ubuntu22.04noarchbind9< 1:9.16.8-1ubuntu3.1UNKNOWN
ubuntu22.10noarchbind9< 1:9.16.8-1ubuntu3.1UNKNOWN
ubuntu23.04noarchbind9< 1:9.16.8-1ubuntu3.1UNKNOWN
ubuntu23.10noarchbind9< 1:9.16.8-1ubuntu3.1UNKNOWN
ubuntu24.04noarchbind9< 1:9.16.8-1ubuntu3.1UNKNOWN
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CVSS2

4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.009

Percentile

83.0%

JSON
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