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Check system and kernel settings for CVE-2021-33909 (Sequoia)

Tactic: Discovery
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This is a professional level chain. This TTP requires an professional license to use.info
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Check the net.core.bpf_jit_enable settings (weak BPF functionality implementation which allows further access to kernel assets), kernel.unprivileged_bpf_disable (weakBPF functionality implementation which allows for unprivileged access), and kernel.unprivileged_userns_clone (enables unprivileged user namespaces).
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Authors

xanthonus

Tactic

Discovery

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Sequoia

2021-10-26

/static/assets/linux-logo.svg
Elevate an unprivileged user to root privileges via CVE-2021-33909 (Sequoia) exploitation.
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