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Vulnerability details: VCID-c3hp-exgk-aaaj
Vulnerability ID VCID-c3hp-exgk-aaaj
Aliases CVE-2021-20251
Summary A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.
Status Published
Exploitability 0.5
Weighted Severity 5.3
Risk 2.6
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20251.json
epss 0.00179 https://api.first.org/data/v1/epss?cve=CVE-2021-20251
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epss 0.00609 https://api.first.org/data/v1/epss?cve=CVE-2021-20251
ssvc Track https://bugzilla.redhat.com/show_bug.cgi?id=1929800
ssvc Track https://bugzilla.samba.org/show_bug.cgi?id=14611
cvssv3.1 8.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-20251
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-20251
ssvc Track https://security.gentoo.org/glsa/202309-06
ssvc Track https://security.netapp.com/advisory/ntap-20230331-0005/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20251.json
https://api.first.org/data/v1/epss?cve=CVE-2021-20251
https://bugzilla.redhat.com/show_bug.cgi?id=1929800
https://bugzilla.samba.org/show_bug.cgi?id=14611
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20251
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202309-06
https://security.netapp.com/advisory/ntap-20230331-0005/
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
CVE-2021-20251 https://nvd.nist.gov/vuln/detail/CVE-2021-20251
USN-5822-1 https://usn.ubuntu.com/5822-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20251.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-06T15:49:41Z/ Found at https://bugzilla.redhat.com/show_bug.cgi?id=1929800
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-06T15:49:41Z/ Found at https://bugzilla.samba.org/show_bug.cgi?id=14611
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20251
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20251
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-06T15:49:41Z/ Found at https://security.gentoo.org/glsa/202309-06
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-03-06T15:49:41Z/ Found at https://security.netapp.com/advisory/ntap-20230331-0005/
Exploit Prediction Scoring System (EPSS)
Percentile 0.36321
EPSS Score 0.00179
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.