CVE-2022-51018 pmmp CVE debrief

Who should care

Defenders and administrators of PocketMine-MP servers should be aware of this vulnerability and take steps to prevent potential attacks. They should assess exposure, verify and update PocketMine-MP versions, and monitor server performance and bandwidth usage to mitigate potential 'book bomb' attacks. Server administrators and defenders should prioritize verifying and updating PocketMine-MP versions to prevent potential server crashes and bandwidth issues.

Why it matters

Defenders should prioritize verifying and updating PocketMine-MP versions to prevent potential server crashes and bandwidth issues caused by 'book bomb' attacks. Server administrators and defenders should assess exposure, as this vulnerability can impact server performance and player experience. The evidence suggests that this vulnerability can be mitigated by updating to the latest versions of PocketMine-MP, but further verification is needed to confirm the extent of the issue and the effectiveness of the fix.

• Potential server crashes due to excessive resource consumption
• Increased bandwidth usage due to oversized NBT 'book bombs'
• Need for verification and updates to prevent potential attacks
• Possible impact on player experience due to server performance issues

Technical summary

PocketMine-MP before 3.26.5 and 4.0.x before 4.0.5 does not limit book page text length, page count, or author/title length, allowing players to create oversized NBT 'book bombs' that can cause server crashes and excess bandwidth consumption. This vulnerability can be mitigated by updating to the latest versions of PocketMine-MP. Server administrators and defenders should assess exposure and consider updating to the latest versions to prevent potential attacks. The vulnerability can impact server performance and player experience.

Defensive priority

Defenders should prioritize verifying and updating PocketMine-MP versions to prevent potential server crashes and bandwidth issues.

Recommended defensive actions

• Verify and update PocketMine-MP to version 3.26.5 or later for PM3, or 4.0.5 or later for PM4
• Monitor server performance and bandwidth usage for potential 'book bomb' attacks
• Restrict writable book access to trusted players
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE description and source references indicate that PocketMine-MP is vulnerable to 'book bomb' attacks, which could lead to server crashes and increased bandwidth usage. The vulnerability is caused by the lack of input validation on book page text length, page count, and author/title length. Defenders should verify and update PocketMine-MP versions to prevent potential server crashes and bandwidth issues. Further verification is needed to confirm the extent of the issue and the effectiveness of the fix. The evidence suggests that

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.