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ubuntucveUbuntu.comUB:CVE-2020-14308
HistoryJul 29, 2020 - 12:00 a.m.

CVE-2020-14308

2020-07-2900:00:00
ubuntu.com
ubuntu.com
11

6.4 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

4.4 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

13.3%

JSON

In grub2 versions before 2.06 the grub memory allocator doesn’t check for
possible arithmetic overflows on the requested allocation size. This leads
the function to return invalid memory allocations which can be further used
to cause possible integrity, confidentiality and availability impacts
during the boot process.

Notes

Author Note
alexmurray grub2-signed is not supported in Ubuntu 12.04 ESM (precise/esm) and so marking the priority for grub2 in this release as low
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchgrub2< 2.02-2ubuntu8.16UNKNOWN
ubuntu20.04noarchgrub2< 2.04-1ubuntu26.1UNKNOWN
ubuntu14.04noarchgrub2< 2.02~beta2-9ubuntu1.20) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchgrub2< 2.02~beta2-36ubuntu3.26UNKNOWN
ubuntu18.04noarchgrub2-signed< 1.93.18UNKNOWN
ubuntu20.04noarchgrub2-signed< 1.142.3UNKNOWN
ubuntu14.04noarchgrub2-signed< 1.34.22) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchgrub2-signed< 1.66.26UNKNOWN
ubuntu18.04noarchgrub2-unsigned< 2.04-1ubuntu47.4UNKNOWN
ubuntu20.04noarchgrub2-unsigned< 2.04-1ubuntu47.4UNKNOWN
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6.4 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

4.4 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

13.3%

JSON
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