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Vulnerability details: VCID-c19s-mkvt-aaae
Vulnerability ID VCID-c19s-mkvt-aaae
Aliases CVE-2021-3671
Summary A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-3671.html
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3671.json
epss 0.00263 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00263 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00263 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00263 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00525 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00744 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00744 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00744 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.00744 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
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epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
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epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
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epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
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epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01131 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01186 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01186 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01186 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01186 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01186 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01186 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01186 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
epss 0.01606 https://api.first.org/data/v1/epss?cve=CVE-2021-3671
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=2013080
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3671
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2021-3671
cvssv3 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-3671
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-3671
archlinux Low https://security.archlinux.org/AVG-2418
generic_textual Medium https://ubuntu.com/security/notices/USN-5142-1
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-3671.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3671.json
https://api.first.org/data/v1/epss?cve=CVE-2021-3671
https://bugzilla.redhat.com/show_bug.cgi?id=2013080,
https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
https://bugzilla.samba.org/show_bug.cgi?id=14770,
https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3671
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44758
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3437
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-41916
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-42898
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44640
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a
https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
https://security.netapp.com/advisory/ntap-20221215-0002/
https://security.netapp.com/advisory/ntap-20230216-0008/
https://ubuntu.com/security/notices/USN-5142-1
https://www.debian.org/security/2022/dsa-5287
2013080 https://bugzilla.redhat.com/show_bug.cgi?id=2013080
996586 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=996586
AVG-2418 https://security.archlinux.org/AVG-2418
cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:management_services_for_netapp_hci:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:management_services_for_netapp_hci:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
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:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CVE-2021-3671 https://nvd.nist.gov/vuln/detail/CVE-2021-3671
USN-5142-1 https://usn.ubuntu.com/5142-1/
USN-5174-1 https://usn.ubuntu.com/5174-1/
USN-5675-1 https://usn.ubuntu.com/5675-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3671.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: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: AV:N/AC:L/Au:S/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3671
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3671
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:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3671
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.65129
EPSS Score 0.00263
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.