CVE-2017-7572
Back In Time Polkit Privilege Race Condition
Description
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/status, by which time the requesting process may have been replaced by a different process with the same PID that has different privileges then the original requester.
INFO
Published Date :
April 6, 2017, 6:59 p.m.
Last Modified :
April 20, 2025, 1:37 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.0 | HIGH | [email protected] |
Solution
- Update the affected backintime package.
- Ensure the system is rebooted after the update.
Public PoC/Exploit Available at Github
CVE-2017-7572 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-7572.
| URL | Resource |
|---|---|
| https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869 | Third Party Advisory |
| https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-7572 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-7572
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Bug History
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-7572 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-7572 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Apr. 12, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869 No Types Assigned https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869 Third Party Advisory Added CWE CWE-362 Added CPE Configuration OR *cpe:2.3:a:backintime_project:backintime:1.1.18:*:*:*:*:*:*:* (and previous)
Vulnerability Scoring Details
Base CVSS Score: 8.1
Base CVSS Score: 9.3
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.65 }} -0.49%
score
0.68393
percentile