CVE-2017-7572
Published: 6 April 2017
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/status, by which time the requesting process may have been replaced by a different process with the same PID that has different privileges then the original requester.
Priority
Status
Package | Release | Status |
---|---|---|
backintime Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
bionic |
Not vulnerable
(1.1.12-2)
|
|
cosmic |
Not vulnerable
(1.1.12-2)
|
|
disco |
Not vulnerable
(1.1.12-2)
|
|
xenial |
Released
(1.1.2-2~build0.16.04.1)
|
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Ignored
(end of life)
|
|
precise |
Ignored
(end of life)
|
|
trusty |
Does not exist
(trusty was needed)
|
|
upstream |
Released
(1.1.12-2)
|
|
Patches: upstream: https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 8.1 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |