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Vulnerability details: VCID-ket1-5bqg-aaah
Vulnerability ID VCID-ket1-5bqg-aaah
Aliases CVE-2021-42376
Summary A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.
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
cvssv3 4.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42376.json
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epss 0.00028 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
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epss 0.00028 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
epss 0.00028 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
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epss 0.00028 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
epss 0.00045 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
epss 0.00045 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
epss 0.00045 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
epss 0.00045 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
epss 0.00045 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
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epss 0.00045 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
epss 0.00045 https://api.first.org/data/v1/epss?cve=CVE-2021-42376
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=2023891
cvssv3.1 4.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual Low https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
cvssv2 1.9 https://nvd.nist.gov/vuln/detail/CVE-2021-42376
cvssv3 5.5 https://nvd.nist.gov/vuln/detail/CVE-2021-42376
cvssv3.1 5.5 https://nvd.nist.gov/vuln/detail/CVE-2021-42376
archlinux Medium https://security.archlinux.org/AVG-2561
archlinux Medium https://security.archlinux.org/AVG-2562
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42376.json
https://api.first.org/data/v1/epss?cve=CVE-2021-42376
https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42376
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/
https://security.netapp.com/advisory/ntap-20211223-0002/
2023891 https://bugzilla.redhat.com/show_bug.cgi?id=2023891
999567 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=999567
AVG-2561 https://security.archlinux.org/AVG-2561
AVG-2562 https://security.archlinux.org/AVG-2562
cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-42376 https://nvd.nist.gov/vuln/detail/CVE-2021-42376
GLSA-202407-17 https://security.gentoo.org/glsa/202407-17
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42376.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:L/AC:H/PR:H/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:L/AC:M/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42376
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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42376
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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42376
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 0.03928
EPSS Score 0.00025
Published At April 5, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.