Use After Free The advisory has been revoked - it doesn't affect any version of package busybox-petitboot (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL6-BUSYBOXPETITBOOT-1922363
- published17 Nov 2021
- disclosed9 Nov 2021
Introduced: 9 Nov 2021
CVE-2021-42386 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:6.
NVD Description
Note: Versions mentioned in the description apply only to the upstream busybox-petitboot package and not the busybox-petitboot package as distributed by RHEL.
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 nvalloc function
References
- https://access.redhat.com/security/cve/CVE-2021-42386
- https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
- 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://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-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://security.netapp.com/advisory/ntap-20211223-0002/