Use-After-Free Vulnerability in Busybox's Awk Applet Affecting Multiple Versions
CVE-2021-42378

7.2HIGH

Key Information:

Vendor

Busybox

Status
Busybox
Vendor
CVE Published:
15 November 2021

What is CVE-2021-42378?

A use-after-free vulnerability exists in the awk applet of Busybox, which could lead to a denial of service and potentially allow for arbitrary code execution. This flaw is triggered by processing specially crafted awk patterns in the getvar_i function. Exploiting this vulnerability may compromise system stability and security.

Affected Version(s)

busybox < 1.34.0

References

https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabil...
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.