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archlinuxArchLinuxASA-201705-12
HistoryMay 10, 2017 - 12:00 a.m.

[ASA-201705-12] kauth: privilege escalation

2017-05-1000:00:00
security.archlinux.org
6

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.3%

Arch Linux Security Advisory ASA-201705-12

Severity: High
Date : 2017-05-10
CVE-ID : CVE-2017-8422
Package : kauth
Type : privilege escalation
Remote : No
Link : https://security.archlinux.org/AVG-269

Summary

The package kauth before version 5.33.0-2 is vulnerable to privilege
escalation.

Resolution

Upgrade to 5.33.0-2.

pacman -Syu “kauth>=5.33.0-2”

The problem has been fixed upstream but no release is available yet.

Workaround

None.

Description

KAuth <= 5.33.0 contains a logic flaw in which the service invoking
dbus is not properly checked. This allows spoofing the identity of the
caller and with some carefully crafted calls can lead to gaining root
from an unprivileged account.

Impact

A local, unprivileged attacker can escalate privileges to become root
on the affected host.

References

https://cgit.kde.org/kauth.git/commit/?id=df875f725293af53399f5146362eb158b4f9216a
https://www.kde.org/info/security/advisory-20170510-1.txt
http://seclists.org/oss-sec/2017/q2/240
https://commits.kde.org/kauth/df875f725293af53399f5146362eb158b4f9216a
https://commits.kde.org/kdelibs/264e97625abe2e0334f97de17f6ffb52582888ab
https://security.archlinux.org/CVE-2017-8422

OSVersionArchitecturePackageVersionFilename
ArchLinuxanyanykauth< 5.33.0-2UNKNOWN

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.3%