Out-of-bounds Read Affecting libsmbclient package, versions <0:4.10.16-15.el7_9


Severity

Recommended
0.0
medium
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.16% (54th percentile)

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  • Snyk IDSNYK-ORACLE7-LIBSMBCLIENT-2584142
  • published10 Apr 2022
  • disclosed5 May 2021

Introduced: 5 May 2021

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

How to fix?

Upgrade Oracle:7 libsmbclient to version 0:4.10.16-15.el7_9 or higher.
This issue was patched in ELSA-2021-2313.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsmbclient package and not the libsmbclient package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1