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ubuntucveUbuntu.comUB:CVE-2020-16127
HistoryNov 03, 2020 - 12:00 a.m.

CVE-2020-16127

2020-11-0300:00:00
ubuntu.com
ubuntu.com
5

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

12.8%

An Ubuntu-specific modification to AccountsService in versions before
0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded
read operations on user-controlled ~/.pam_environment files, allowing an
infinite loop if /dev/zero is symlinked to this location.

Bugs

Notes

Author Note
mdeslaur This vulnerability is in an Ubuntu-specific patch and doesn’t affect the upstream code.
OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchaccountsservice< 0.6.55-0ubuntu12~20.04.4UNKNOWN
ubuntu20.10noarchaccountsservice< 0.6.55-0ubuntu13.2UNKNOWN

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

12.8%