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alpinelinuxAlpine Linux Development TeamALPINE:CVE-2021-25219
HistoryOct 27, 2021 - 9:15 p.m.

CVE-2021-25219

2021-10-2721:15:07
Alpine Linux Development Team
security.alpinelinux.org
25
bind
vulnerability
resolver performance
response processing
flaw
exploitation
lame cache
data structures
degradation

CVSS2

5

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

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

EPSS

0.007

Percentile

80.6%

JSON

In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.

OSVersionArchitecturePackageVersionFilename
Alpine3.11-mainnoarchbind= 9.16.20-r1UNKNOWN
Alpineedge-mainnoarchbind< 9.16.22-r0UNKNOWN
Alpine3.12-mainnoarchbind< 9.16.27-r0UNKNOWN
Alpine3.13-mainnoarchbind< 9.16.25-r0UNKNOWN
Alpine3.14-mainnoarchbind< 9.16.25-r0UNKNOWN
Alpine3.15-mainnoarchbind< 9.16.22-r0UNKNOWN
Alpine3.16-mainnoarchbind< 9.16.22-r0UNKNOWN
Alpine3.17-mainnoarchbind< 9.16.22-r0UNKNOWN
Alpine3.18-mainnoarchbind< 9.16.22-r0UNKNOWN
Alpine3.19-mainnoarchbind< 9.16.22-r0UNKNOWN
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CVSS2

5

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

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

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User Interaction

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Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

EPSS

0.007

Percentile

80.6%

JSON
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