Out-of-bounds Read Affecting samba package, versions [3.6.0,4.12.15)[4.13.0,4.13.8)[4.14.0,4.14.4)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.16% (54th percentile)

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  • Snyk IDSNYK-UNMANAGED-SAMBA-2370452
  • published26 Jan 2022
  • disclosed5 May 2021
  • creditUnknown

Introduced: 5 May 2021

CVE-2021-20254  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade samba to version 4.12.15, 4.13.8, 4.14.4 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Read. A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.

References

CVSS Scores

version 3.1