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alpinelinuxAlpine Linux Development TeamALPINE:CVE-2021-20254
HistoryMay 05, 2021 - 2:15 p.m.

CVE-2021-20254

2021-05-0514:15:07
Alpine Linux Development Team
security.alpinelinux.org
22
samba
file server
windows group identities
unix group ids
vulnerability
data confidentiality
data integrity
cve-2021-20254

CVSS2

4.9

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

CVSS3

6.8

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

AI Score

7

Confidence

High

EPSS

0.004

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.

Related

nessus 49
redhat 6
openvas 34
fedora 3
ibm 4
osv 7
freebsd 1
oraclelinux 2
cvelist 1
almalinux 1
cbl_mariner 1
altlinux 2
prion 1
centos 1
ubuntucve 1
cisa 1
rocky 1
ubuntu 2
samba 1
amazon 2
redhatcve 1
debiancve 1
veracode 1
nvd 1
cve 1
suse 2
mageia 1
gentoo 1
debian 1
rosalinux 2
nessus
nessus
NewStart CGSL CORE 5.04 / MAIN 5.04 : samba Vulnerability (NS-SA-2021-0114)
2021-10-28 00:00:00
Amazon Linux 2 : samba (ALAS-2021-1680)
2021-07-01 00:00:00
EulerOS 2.0 SP9 : samba (EulerOS-SA-2021-2256)
2021-08-09 00:00:00
redhat
redhat
(RHSA-2021:3988) Moderate: samba security update
2021-10-26 07:01:25
(RHSA-2021:4058) Moderate: samba security update
2021-11-02 07:48:59
(RHSA-2021:4866) Moderate: samba security update
2021-11-30 15:15:12
openvas
openvas
SUSE: Security Advisory (SUSE-SU-2021:1438-1)
2021-06-09 00:00:00
Huawei EulerOS: Security Advisory for samba (EulerOS-SA-2021-2179)
2021-07-13 00:00:00
Huawei EulerOS: Security Advisory for samba (EulerOS-SA-2021-2347)
2021-09-04 00:00:00
fedora
fedora
[SECURITY] Fedora 33 Update: samba-4.13.8-0.fc33
2021-05-07 00:48:11
[SECURITY] Fedora 32 Update: samba-4.12.15-0.fc32
2021-05-08 01:10:40
[SECURITY] Fedora 34 Update: samba-4.14.4-0.fc34
2021-04-30 00:56:42
ibm
ibm
Security Bulletin: A vulnerability in Samba affects IBM Spectrum Scale SMB protocol access method (CVE-2021-20254)
2021-12-06 14:13:55
Security Bulletin: Samba for IBM i is affected by CVE-2021-20254
2021-05-13 14:26:31
Security Bulletin: Multiple Samba vulnerability issues in IBM Storwize V7000 Unified
2021-10-14 16:55:46
osv
osv
CVE-2021-20254
2021-05-05 14:15:07
Moderate: samba security update
2021-11-02 07:48:59
Moderate: samba security update
2021-11-02 07:48:59
freebsd
freebsd
samba -- negative idmap cache entries vulnerability
2021-04-29 00:00:00
oraclelinux
oraclelinux
samba security and bug fix update
2021-06-09 00:00:00
samba security update
2021-11-02 00:00:00
cvelist
cvelist
CVE-2021-20254
2021-05-05 13:36:32
almalinux
almalinux
Moderate: samba security update
2021-11-02 07:48:59
cbl_mariner
cbl_mariner
CVE-2021-20254 affecting package samba 4.12.5-6
2024-10-01 22:11:53
altlinux
altlinux
Security fix for the ALT Linux 10 package samba version 4.14.4-alt1
2021-04-30 00:00:00
Security fix for the ALT Linux 10 package samba version 4.14.4-alt2
2021-05-06 00:00:00
prion
prion
Design/Logic Flaw
2021-05-05 14:15:00
centos
centos
ctdb, libsmbclient, libwbclient, samba security update
2021-06-14 18:37:00
ubuntucve
ubuntucve
CVE-2021-20254
2021-04-29 00:00:00
cisa
cisa
Samba Releases Security Updates
2021-04-30 00:00:00
rocky
rocky
samba security update
2021-11-02 07:48:59
ubuntu
ubuntu
Samba vulnerability
2021-04-29 00:00:00
Samba vulnerabilities
2021-05-03 00:00:00
samba
samba
Negative idmap cache entries can cause incorrect
2021-04-29 00:00:00
amazon
amazon
Medium: samba
2021-07-01 01:06:00
Critical: samba
2022-02-10 21:59:00
redhatcve
redhatcve
CVE-2021-20254
2021-04-29 10:18:51
debiancve
debiancve
CVE-2021-20254
2021-05-05 14:15:07
veracode
veracode
Information Disclosure
2021-05-06 11:27:33
nvd
nvd
CVE-2021-20254
2021-05-05 14:15:07
cve
cve
CVE-2021-20254
2021-05-05 14:15:07
suse
suse
Security update for samba (important)
2021-09-22 00:00:00
Security update for samba (important)
2021-05-01 00:00:00
mageia
mageia
Updated samba and ldb packages fix security vulnerabilities
2021-06-25 17:43:41
gentoo
gentoo
Samba: Multiple vulnerabilities
2021-05-26 00:00:00
debian
debian
[SECURITY] [DLA 2668-1] samba security update
2021-05-29 11:11:27
rosalinux
rosalinux
Advisory ROSA-SA-2021-1967
2021-07-02 18:07:38
Advisory ROSA-SA-2024-2451
2024-07-15 09:04:20

CVSS2

4.9

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

CVSS3

6.8

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

AI Score

7

Confidence

High

EPSS

0.004

Percentile

74.4%

JSON
Related for ALPINE:CVE-2021-20254
nessus49redhat6openvas34fedora3ibm4osv7freebsd1oraclelinux2cvelist1almalinux1cbl_mariner1altlinux2prion1centos1ubuntucve1cisa1rocky1ubuntu2samba1amazon2redhatcve1debiancve1veracode1nvd1cve1suse2mageia1gentoo1debian1rosalinux2