Description
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space. Kernels up to 5.11 (including) are vulnerable. More information about vulnerable kernels is available at https://nvd.nist.gov/vuln/detail/CVE-2021-22555#vulnConfigurationsArea
Module options
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/linux/local/netfilter/xtables_heap_oob_write_priv_escmsf undefined(xtables_heap_oob_write_priv_esc) > show actions ...actions...msf undefined(xtables_heap_oob_write_priv_esc) > set ACTION < action-name >msf undefined(xtables_heap_oob_write_priv_esc) > show options ...show and set options...msf undefined(xtables_heap_oob_write_priv_esc) > runPrioritise with Active Threat Intelligence
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