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[email protected]CVE-2021-20254

HistoryMay 05, 2021 - 2:15 p.m.

CVE-2021-20254

2021-05-0514:15:07

CWE-125

[email protected]

web.nvd.nist.gov

715

samba

smbd

file server

cve-2021-20254

vulnerability

data confidentiality

data integrity

nvd

4.9 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:S/C:P/I:P/A:N

6.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

6.8 Medium

AI Score

Confidence

High

0.004 Low

EPSS

Percentile

74.4%

JSON

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.

Affected configurations

Vulners

NVD

Node

sambasambaRange≤4.14.1

sambasambaRange≤4.13.6

sambasambaRange≤4.12.13

VendorProductVersionCPE
sambasamba*cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
sambasamba*cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
sambasamba*cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
samba	samba	*	cpe:2.3:a:samba:samba::::::::
samba	samba	*	cpe:2.3:a:samba:samba::::::::
samba	samba	*	cpe:2.3:a:samba:samba::::::::

CNA Affected

[
  {
    "product": "samba",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "samba 4.14.1, samba 4.13.6, samba 4.12.13"
      }
    ]
  }
]