Arnold Chan
@slazTrusted contributorCompletionist
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Detects anomalous staging activity associated with the 'PPPoEject' exploit. The rule identifies the creation of GRE or IP6GRE interfaces on bonding devices immediately preceding or concurrent with FUSE filesystem mounting or I/O activity. This pattern matches the exploitation workflow of racing pppoe_sendmsg() skb reallocation via dev_hard_header() to achieve privilege escalation.
Detects anomalous staging activity associated with the 'PPPoEject' exploit. The rule identifies the creation of GRE or IP6GRE interfaces on bonding devices immediately preceding or concurrent with FUSE filesystem mounting or I/O activity. This pattern matches the exploitation workflow of racing pppoe_sendmsg() skb reallocation via dev_hard_header() to achieve privilege escalation.
Detects anomalous staging activity associated with the 'PPPoEject' exploit. The rule identifies the creation of GRE or IP6GRE interfaces on bonding devices immediately preceding or concurrent with FUSE filesystem mounting or I/O activity. This pattern matches the exploitation workflow of racing pppoe_sendmsg() skb reallocation via dev_hard_header() to achieve privilege escalation.
Detects anomalous staging activity associated with the 'PPPoEject' exploit. The rule identifies the creation of GRE or IP6GRE interfaces on bonding devices immediately preceding or concurrent with FUSE filesystem mounting or I/O activity. This pattern matches the exploitation workflow of racing pppoe_sendmsg() skb reallocation via dev_hard_header() to achieve privilege escalation.
This rule identifies Linux devices with kernel versions that are vulnerable to CVE-2026-80844, CVE-2026-81000, CVE-2026-68121, and CVE-2026-74469. It parses the OSBuild field to extract kernel major, minor, and patch version numbers and compares them against known unpatched releases.
Detects unauthorized modifications, creations, or renames of Pluggable Authentication Module (PAM) configuration files or core shared libraries (such as pam_rootok.so or pam_permit.so) by non-root users. Attackers often modify these files to bypass authentication mechanisms and achieve privilege escalation. The rule excludes common package management tools to minimize false positives.
Detects a specifically malformed IPv6 Routing Header (type 0) with a 'segments_left' value of 255 preceding an Authentication Header (AH). This signature targets an exploit pattern known as 'DirtyAH6', which aims to trigger a remote kernel crash or potential remote code execution on vulnerable systems by manipulating IPv6 header processing.
Detects anomalous process execution patterns involving netkit devices and virtual network interfaces (VXLAN/OVS) configured with oversized headroom, characteristic of the TUNderflow (CVE-2026-81000) exploitation chain. The rule monitors for the staging of netkit devices and specific OVS command-line interactions by non-privileged accounts, excluding known legitimate SDN and CNI infrastructure management processes.
Detects anomalous process execution patterns involving netkit devices and virtual network interfaces (VXLAN/OVS) configured with oversized headroom, characteristic of the TUNderflow (CVE-2026-81000) exploitation chain. The rule monitors for the staging of netkit devices and specific OVS command-line interactions by non-privileged accounts, excluding known legitimate SDN and CNI infrastructure management processes.
This rule detects kernel crash signatures (e.g., use-after-free, kernel panic) in the pppoe module, correlated with preceding anomalous activity related to PPPoEject or PPPoE socket manipulation. It identifies potential exploitation of CVE-2026-68121 on non-gateway devices.
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