High severity · published Nov 15, 2021
CVE-2021-42381
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the hash_init function
7.2
CVSS
2.8%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.8% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BU
Busybox · Busybox
1.21.0 through 1.33.1 · source: NVD
FE
Fedora · Fedoraproject
33; 34 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42381
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42381
claroty.com
https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog
Third Party Advisory
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211223-0002/
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/01/msg00012.html
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