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Bug 830983 (CVE-2021-20316) - <net-fs/samba-4.15.0: Symlink race condition (CVE-2021-20316)
Summary: <net-fs/samba-4.15.0: Symlink race condition (CVE-2021-20316)
Status: IN_PROGRESS
Alias: CVE-2021-20316
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
URL: https://marc.info/?l=samba-announce&m...
Whiteboard: B3 [glsa? cleanup]
Keywords:
Depends on: 828680
Blocks:
  Show dependency tree
 
Reported: 2022-01-11 03:43 UTC by Sam James
Modified: 2022-02-18 04:59 UTC (History)
3 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description Sam James archtester Gentoo Infrastructure gentoo-dev Security 2022-01-11 03:43:49 UTC
Not listed on the website for some reason.

See https://marc.info/?l=samba-announce&m=164182636010686&w=2:
```

All versions of the Samba file server prior to 4.15.0 are affected by 
CVE-2021-20316. There will be no patches available for older Samba 
versions before 4.15 and 4.15 itself is already secure.

  * CVE-2021-20316: Symlink race error can allow metadata read
    and modify outside of the exported share.

https://www.samba.org/samba/security/CVE-2021-20316.html

Please update affected systems as soon as possible.
```

Earlier versions *are* affected but as explained in the advisory, can't be trivially fixed. So, probably time to stable a 4.15.x (bug 828680).

So, all we need to do is stable 4.15.x.