CVE-2017-7572

The _checkPolkitPrivilege function in serviceHelper.py in Back In Time (aka backintime) 1.1.18 and earlier uses a deprecated polkit authorization method (unix-process) that is subject to a race condition (time of check, time of use). With this authorization method, the owner of a process requesting a polkit operation is checked by polkitd via /proc/<pid>/status, by which time the requesting process may have been replaced by a different process with the same PID that has different privileges then the original requester.

CVSS v3.0 8.1 HIGH
CVSS v2.0 9.3 HIGH

8.1^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.3^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 8.6 / Impact : 10.0

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:backintime_project:backintime:*:*:*:*:*:*:*:*

Information

Published : 2017-04-06 11:59

Updated : 2017-04-12 13:48

NVD link : CVE-2017-7572

Mitre link : CVE-2017-7572

JSON object : View

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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Products Affected

backintime_project

backintime

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