Vulnerability Details : CVE-2021-20254

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.
Published 2021-05-05 14:15:08
Updated 2021-06-24 18:30:43
Source Red Hat, Inc.
View at NVD,   CVE.org

Threat overview for CVE-2021-20254

Top countries where our scanners detected CVE-2021-20254
Top open port discovered on systems with this issue 80
IPs affected by CVE-2021-20254 254,368
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-20254!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-20254

EPSS FAQ
0.42%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20254

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.9
 MEDIUM AV:N/AC:M/Au:S/C:P/I:P/A:N
6.8
4.9
 NIST
6.8
 MEDIUM CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
1.6
5.2
 NIST

CWE ids for CVE-2021-20254

  • The product reads data past the end, or before the beginning, of the intended buffer.
    Assigned by: secalert@redhat.com (Primary)

References for CVE-2021-20254

Products affected by CVE-2021-20254

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