CVE-2020-16127

CVSS V2 Low 2.1 CVSS V3 Medium 5.5

Description

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.

Overview

CVE ID
CVE-2020-16127

Assigner
security@ubuntu.com

Vulnerability Status
Analyzed

Published Version
2020-11-11T04:15:12

Last Modified Date
2020-11-24T19:50:07

Weakness Enumerations

CWE	URL
CWE-835	http://cwe.mitre.org/data/definitions/835.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:freedesktop:accountsservice::::::::	1	OR		0.6.55

CVSS Version 2

Version
2.0

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

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
PARTIAL

Base Score
2.1

Severity
LOW

Exploitability Score
3.9

Impact Score
2.9

CVSS Version 3

Version
3.1

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

Attack Vector
LOCAL

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
5.5

Base Severity
MEDIUM

Exploitability Score
1.8

Impact Score
3.6

References

Reference URL	Reference Tags
https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS	Exploit Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-16127
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16127

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 16:18:59				Added to TrackCVE
2022-12-05 16:24:51	2020-11-11T04:15Z	2020-11-11T04:15:12	CVE Published Date	updated
2022-12-05 16:24:51		2020-11-24T19:50:07	CVE Modified Date	updated
2022-12-05 16:24:51		Analyzed	Vulnerability Status	updated