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ubuntucveUbuntu.comUB:CVE-2021-45485
HistoryDec 25, 2021 - 12:00 a.m.

CVE-2021-45485

2021-12-2500:00:00
ubuntu.com
ubuntu.com
23

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

38.6%

In the IPv6 implementation in the Linux kernel before 5.13.3,
net/ipv6/output_core.c has an information leak because of certain use of a
hash table which, although big, doesn’t properly consider that IPv6-based
attackers can typically choose among many IPv6 source addresses.

Notes

Author Note
sbeattie complementary to CVE-2021-45486
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-156.163UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-84.94UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-219.252) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1111.118UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1056.59UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1099.104) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1135.149) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-aws-5.11< 5.11.0-1019.20~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1056.59~18.04.1UNKNOWN
ubuntu16.04noarchlinux-aws-hwe< 4.15.0-1111.118~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
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7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

38.6%

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