Описание
Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | released | 2.20.9-0ubuntu7.14 |
| devel | released | 2.20.11-0ubuntu22 |
| eoan | released | 2.20.11-0ubuntu8.8 |
| esm-infra-legacy/trusty | released | 2.14.1-0ubuntu3.29+esm4 |
| esm-infra/bionic | released | 2.20.9-0ubuntu7.14 |
| esm-infra/focal | released | 2.20.11-0ubuntu22 |
| esm-infra/xenial | released | 2.20.1-0ubuntu2.23 |
| focal | released | 2.20.11-0ubuntu22 |
| precise/esm | DNE | |
| trusty | ignored | end of standard support |
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EPSS
1.9 Low
CVSS2
5.6 Medium
CVSS3
Связанные уязвимости
Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.
Time-of-check Time-of-use Race Condition vulnerability on crash report ownership change in Apport allows for a possible privilege escalation opportunity. If fs.protected_symlinks is disabled, this can be exploited between the os.open and os.chown calls when the Apport cron script clears out crash files of size 0. A symlink with the same name as the deleted file can then be created upon which chown will be called, changing the file owner to root. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.
EPSS
1.9 Low
CVSS2
5.6 Medium
CVSS3