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ubuntuUbuntuUSN-4638-1
HistoryNov 19, 2020 - 12:00 a.m.

c-ares vulnerability

2020-11-1900:00:00
ubuntu.com
48

7.5 High

CVSS3

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

7.9 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.008 Low

EPSS

Percentile

80.9%

JSON

Releases

  • Ubuntu 20.10

Packages

  • c-ares - library for asynchronous name resolution

Details

It was discovered that c-ares incorrectly handled certain DNS requests.
An attacker could possibly use this issue to cause a denial of service.

OSVersionArchitecturePackageVersionFilename
Ubuntu20.10noarchlibc-ares2< 1.16.1-1ubuntu0.1UNKNOWN
Ubuntu20.10noarchlibc-ares-dev< 1.16.1-1ubuntu0.1UNKNOWN
Ubuntu20.10noarchlibc-ares2-dbgsym< 1.16.1-1ubuntu0.1UNKNOWN

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7.5 High

CVSS3

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

7.9 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.008 Low

EPSS

Percentile

80.9%

JSON
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