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Vulnerability details: VCID-av9h-6859-aaac
Vulnerability ID VCID-av9h-6859-aaac
Aliases CVE-2021-42377
Summary An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-763 Release of Invalid Pointer or Reference
CWE-20 Improper Input Validation
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-42377.html
cvssv3 6.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42377.json
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.01798 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.02528 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.02693 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.02693 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.02693 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.02693 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.02693 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.02855 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.02855 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
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epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.03035 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
epss 0.09323 https://api.first.org/data/v1/epss?cve=CVE-2021-42377
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=2023895
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42377
cvssv3.1 6.4 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 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-42377
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2021-42377
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2021-42377
archlinux Medium https://security.archlinux.org/AVG-2561
archlinux Medium https://security.archlinux.org/AVG-2562
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-42377.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42377.json
https://api.first.org/data/v1/epss?cve=CVE-2021-42377
https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42377
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/
2023895 https://bugzilla.redhat.com/show_bug.cgi?id=2023895
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:1.33.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:busybox:busybox:1.33.0:*:*:*:*:*:*:*
cpe:2.3:a:busybox:busybox:1.33.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:busybox:busybox:1.33.1:*:*:*:*:*:*:*
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-2021-42377 https://nvd.nist.gov/vuln/detail/CVE-2021-42377
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:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-42377.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: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: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42377
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:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42377
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:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-42377
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 0.88493
EPSS Score 0.01798
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.