CVE-2017-7572

Severity: high (CVSS 8.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-04-06 · updated 2026-06-17
Weakness: CWE-362

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/status, by which time the requesting process may have been replaced by a different process with the same PID that has different privileges then the original requester.

Affected products

Backintime Project Backintime: through 1.1.18

References

https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869
https://github.com/bit-team/backintime/commit/7f208dc547f569b689c888103e3b593a48cd1869

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