QID 376088

Date Published: 2021-11-22

QID 376088: BusyBox Use After Free Vulnerability

BusyBox is a software suite of many useful Unix utilities, known as applets, that are packaged as a single executable file. Within BusyBox you can find a full-fledged shell, a DHCP client/server, and small utilities such as cp, ls, grep, and others.

A use-after-free in awk leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function

Affected Versions:
1.16-1.33.1

Successful exploitation causes denial of service and possible code execution.

CVSS V3 rated as High - 7.2 severity.

CVSS V2 rated as High - 6.5 severity.

Solution

Customers are advised to update to BusyBox version 1.34.0 or later, for more info please refer here

Vendor References

CVE-2021-42378 - jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/

CVEs related to QID 376088

CVE-2021-42378 |

Software Advisories

Advisory ID	Software	Component	Link
NA			busybox.net/

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Array ( [qid] => 376088 [title] => BusyBox Use After Free Vulnerability [severity] => 3 [description] => BusyBox is a software suite of many useful Unix utilities, known as applets, that are packaged as a single executable file. Within BusyBox you can find a full-fledged shell, a DHCP client/server, and small utilities such as cp, ls, grep, and others.

A use-after-free in awk leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function

Affected Versions:
1.16-1.33.1

[solution] => Customers are advised to update to BusyBox version 1.34.0 or later, for more info please refer here

[consequence] => Successful exploitation causes denial of service and possible code execution. [published] => Yes [date_insert] => 2021-11-17 [date_published] => 2021-11-22 [cve] => Array ( [0] => CVE-2021-42378 ) [vendor_refs] => Array ( [0] => Array ( [vendor_ref] => CVE-2021-42378 [vendor_ref_url] => https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/ ) ) [cvss_v2] => Array ( [basescore] => 6.5 [temporalscore] => 4.8 ) [cvss_v3] => Array ( [basescore] => 7.2 [temporalscore] => 6 ) [patches] => Array ( [0] => Array ( [link] => https://busybox.net/ [advisory_id] => NA [os_sw] => [component] => ) ) )